ppose we have the following utility function: U(x,y)=x0.75 0.25 a) Calculate the marginal rate of substitution and comment on what you know about the shape of the indifference curve, as well as what that implies about your preferences. b) Suppose we have a budget constraint that may be written as 2xty=100. What are prices and income? Draw the budget constraint. c) What is your optimal level of x and y with the above information