Which is the new type of Dashboard Chart to make entry in Spring'11 Release?

A Look-up field can look up to what?

An administrator at Universal Containers needs a simple way to trigger an alert to the director of
sales when opportunities reach an amount of $500,000.
What should the administrator configure to meet this requirement?

To log into the Data Loader, the IP address must be a trusted IP or the User must know their security token.

Field-level security can be used to make a field required