An investor has $1,000,000 to invest and wants to maximize the money they will receive at the end of one year. They can invest in condos, apartments and houses. The profit after one year, the cost and the number of units available are shown below. Profit Cost Number Variable Investment ($1,000) ($1,000) Available X1 Condos 6 50 30 Apartments 12 90 16 X3 Houses 9 100 9 The mathematical formulation of this ILP problem is given below: MAX 6X1 + 12X2+9 X3 Subject to: 50X1 + 90 X2 + 100 X3 $ 1000 X1 $ 30 X2 $ 16 Xi 2 0 and integer Use Solver to find the optimal solution of this ILP