Individual problem 1 1) A retail store in Surrey, BC, receives shipments of a particular product from Hong Kong and Macau. Let x = units of product received from Honk Kong and y= units of product received from Macau a. Write an expression for the total units of product received by the retail store in Surrey (2 marks) b. Shipments from Hong Kong cost $0.25 per unit, and shipments from Macau cost $0.35 per unit. Develop an objective function representing the total cost of shipments to Surrey (2 marks) C Assuming the monthly demand at the retail store is 7500 units, develop a constraint that requires 7500 units to be shipped to Surrey (2 marks) d. No more than 4500 units can be shipped from Hong Kong and no more than 3000 units can be shipped from Macau in a month Develop constraints to model this situation. (2 marks) e Of course, negative amounts cannot be shipped. Combine the objective function and constraints developed to state a mathematical model for satisfying the demand at the Surrey retail store at minimum cost. (2 marks)