Investments Plan	Expected Return, E(r)	Standard Deviation,
A	0.20	0.5
B	0.24	0.7
C	0.28	0.18
D	0.32	0.23

Utility function U = E(r) 1/2A²

Based on the above utility function, which investment plan would Sarah choose if she was risk averse with A =5?

What is the importance of "A" in the utility function?

7 marks

Need full steps please!