Answer:
Step 1:
Net return from investment portfolio
Investment portfolio basically involves pool of investments through which investor strives to ascertain income or make profit with an aim to keep his capital or principal amount safe. Thus the securities underlying such portfolio are selected on the basis of robust combination of risk and associated rewards. Since low risk security would yield low return and vice- versa.
Step 2:
[ Find attachment 1]
Step 3 :
[ Find attachment 2]
Note: I have added entries of question in the question for help