Please show all work!

Investments: 1, 2, 3, 4 Expected return E(r): 0.12, 0.15, 0.21, 0.24 Standard deviation: 0.3, 0.5, 0.16, 0.21

U = E(r) - (A/2)s2 ,where A = 4.0. Based on the utility function above, which investment would you select?

A. 1

B. 2

C. 3

D. 4

E. Cannot tell from the information given