1 - Open the table in the Datasheet view.
2 - Click the Home tab.
3 - Click the Totals button in the Records group.
4 - In the Total row, choose the Sum operation.
Explanation:
1.Open the table in the Datasheet view.

2.Click the Totals button in the Records group on the Home tab.

3.In the Total row, choose the operation required to perform.

In order to mitigate the risk, you should use the Compact and Repair Database. The Compact and Repair Database is a command used in Microsoft Office Access 2010. It rearranges data, fills up the spaces left behind by the deleted objects, and repairs the problems. It compresses the database if any problem is encountered in the Access database.
Answer C is incorrect. The Back Up Database is used to save the database file to a removable disk or network drive to ensure that it is safe from problems.
Answer D is incorrect. The Linked Table Manager is used to list the paths to all currently linked tables.
Answer B is incorrect. The Database Documenter is used to create a report containing all information about each selected Microsoft Access.

The Yes/No datatype is a Boolean datatype that is used to specify whether a condition is true or false. A record can be retrieved based on any given condition. A user can use the WHERE clause to retrieve the data for those records that have been set to yes or no.
Answer A is incorrect. The OLE Object datatype is used to attach files and add binary data to a table. This datatype stores each data in a bitmap format. This results in an increase in the size of a database file. Only a single file can be added to each row of a table. The files attached can be Microsoft Office files, graphics files, sound files, pdf files, etc.
Answer B is incorrect. The Memo datatype stores alphanumeric values. These values can be numbers, alphabets, special characters such as <, >, ?, etc. This datatype is used in place of the Text datatype. It can store 65,535 characters. It also accepts text with rich text format, paragraphs, descriptions, etc.
Answer D is incorrect. The AutoNumber datatype is used for inserting a number automatically and incrementing it by one when a new record is inserted in a table. The increment can be changed through the New Values property. This property has the following two values:
Increment
Random

Explanation:
In order to accomplish the task, you should choose the Navigation button in the Forms group. It allows a user to browse to different forms and reports created in Microsoft Office Access 2010. The Navigation button has various options as shown in the image given below:

The various benefits of specifying a primary key for a table are as follows:
MS Access improves the database performance by automatically generating an index for the primary key.
MS Access ensures that each record consists of a value in the primary key field.
MS Access ensures that each value in the primary key field is unique.
Answer A is incorrect. Domain integrity enforces data validity by restricting the data type, valid values (using CHECK constraints and rules), and range of possible values (using FOREIGN KEY constraints) for columns in a table.