Consider the following 0-1 integer programing problem where xi = 1 if drop box location i is used, 0 otherwise, i= 1, 2,…6. Solve the model using excel and write the optimal solution in the box given below (10 points)Minx1 + x2 + x3 + x4 + x5 + x6s. t.x1 + x2 + x5 + x6 >= 2x2 + x4 + x5 >=2x1 + x2 + x4 + x6 >=2x3 + x4 + x5 >= 2x1 + x2 + x5 >= 2x3 + x4 >= 2x1 + x2 + x6 >= 2