Can you also help me figure out the assets standard deviation?

A. 11.4

B. 13.7

C. 12.0

D. 14.1

Terry Dactel is considering the purchase of an asset having the following cash flows: K Prob K K (K-K) (K-K Prob(K-KProb 20 0.40 10 0.50 $30 0.10 What is the asset's expected return: $11 $10 $20