The SAP BW live model is a type of live data connection that allows you to access data from SAP Business Warehouse (BW) systems without importing it into SAP Analytics Cloud. The SAP BW live model supports the following calculation types:
Aggregation: You can use aggregation functions, such as SUM, COUNT, MIN, MAX, etc., to calculate the values of a measure based on a dimension or a filter.
Currency conversion: You can use currency conversion to convert the values of a measure from one currency to another based on predefined exchange rates.
Unit conversion: You can use unit conversion to convert the values of a measure from one unit of measurement to another based on predefined conversion factors.
The SAP BW live model does not support the following calculation types:
Dimension to measure: You cannot convert a dimension to a measure in a SAP BW live model.
Date difference: You cannot calculate the difference between two dates in a SAP BW live model.
Story calculation: You cannot create story calculations in a SAP BW live model.
Therefore, the correct answer is Aggregation, as it is the calculation type that the SAP BW live model supports. Verified Reference:: Create Calculations in Models: SAP BW Live Data Connection

The presentation types for the Digital Boardroom are dashboard and agend a. Dashboard allows users to create a custom layout of widgets and pages on a large screen, such as a wall-mounted monitor or a projector. Agenda allows users to create a structured sequence of pages and topics that can be navigated using a touch screen, such as a tablet or a laptop. Custom and canvas are not presentation types for the Digital Boardroom; they are options that can be used to design dashboard layouts or story pages. Verified Reference: [SAP Analytics Cloud - Digital Boardroom]