I know for I and II to add signed and unsigned they have to be converted to integer first, but don't know how to declare it in the assignment statement could you please show how to or give an example I don't know what to put for the arg,size when using to_signed(arg,size)

Using the conversion functions below answer Q1. Q1: Write the VHDL assignment statements (just the three statements for the three scenarios below; not the complete VHDL file with entity and architecture) with appropriate conversion functions for S