Ronald has $18,000. but he is forced to bet it on the flip of a fair con. if he wins he has $36,000. if he loses he has nothing. Ronald's expected utility function is u(x,y)=0.5x1^0.5 + 0.5y1^0.5, where x is his wealth if heads comes up and y is his wealth if tails comes up. what is the equivalent certain income to this bet? show your work.