behavioral economics help me

1. (25 pts) Suppose that Mary has a utility function U(W) = Wo5. Her only asset is the shares in the start-up e-com company. Next week she will learn the stock's value. She believes that it is worth $225 with the probability 1/3, $196 with the probability 1/2 and $144 with the probability_1/6. Write down the prospect and calculate the expected value and her expected utility