using excel

a) Resolve the following two systems of equations firstly using Excel's matrix functions ("MMULT" and "MINVERSE"), and secondly using Solver. Compare the results obtained from the matrix operations to those obtained by Solver. i. x+ y = 6 4x + y = 12 -6x - 3x2 + 4x3 + 5x4 = 5 -2x1 - 2x2 + 2x3 + 3x4 = 2 -6x1 + 1x3 + 9x4 = 1 -2x1 - 5x2 + 5x3 - 1x4 = 6 Hint: a possible solution is (1/3,5/3,3,0) b) Use Solver to solve the following integer linear program. Ascribe a simple context to this ILP, and interpret the solution within that context. Max (= 4x + 9x2 + 2x3) Such that 3x + 4x2 + x3 353 X1, X2, X3 are nonnegative integers