3. The following problems deal with Ceren's preferences for music downloads (Yes some people do pay for music downloads!) m and pizza p, which are given by the following utility function: u(m, p) = mp (a) What is Ceren's Marginal Rate of Substitution of m in terms of p (how many units of p is she willing to give up for a unit of m.) (b) Assume Ceren faces prices of $1 downloads and $2 pizza slices, what is the value of the marginal rate of substitution at Ceren's optimal choice? Why? (c) If Ceren has $60 to spend, write an equation representing Ceren's budget constraint. (d) What is the optimal bundle of goods Ceren purchases