Anna is operating in a perfect capital market and she is concerned with maximizing her utility of consumption at times 1 and 2. Her utility function is expressed by U=c1 c2^0.7. Anna is constrained by her present income y1 of $1500, her future income y2 of $840 and the market interest rate of 5%.Annas optimal level of utility is *

a. U= 169,651.8 utils

b. Irrelevant

c. U=165,480.29 utils

d. More information is needed about the risk tolerance of the agent (risk loving, risk averse or risk neutral)