Help!!!

Suppose the utility maximization problem facing a consumer is given by: Maximize utility: U = X1X2 Subject to a budget constraint: ] = P X, + P2X2 Suppose also that the Lagrangian of the utility maximization problem is L = XX2 + A(1 - PIX1 - P2X2) Now suppose, again, that the following represent the solution to the consumer's utility- maximizing problem (the optimal bundles): I I xi = X2 1 = 2P1 2P2 2P1P2 a. How would you interpret ,? b. Suppose 2 - 15. By how much will the maximum value of the objective function change if income/ wealth increases by $1