Answer:
23.1%
28.4%
26.6%
Step-by-step explanation:
A) THE CONTROLLABLE MARGIN & EXPECTED ROI = 23.1%
B) THE CONTROLLABLE MARGIN & EXPECTED ROI UNDER ALTERNATIVE 1 and ALTERNATIVE 2 are =28.4% and 26.6%
Further explanations on how I arrived at this answer is in the attached file, please kindly go through it.