1} A retail store in Surrey, BC. receives shipments of a particular product from Hong Kong and Macao. Lets.\" = units of product received from Honk Kong and y: units of product received from tvlacau 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 $0.20 per unit, and shipments from tvlacau cost $0.30 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 SSDEI units. develop a constraint that requires BSDEI units to be shipped to Surrey. (2 marks) cl. No more than SSDD units can be shipped from Hong Kong and no more than 4200 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. lCombine the objective function and constraints developed to state a mathematical model for satisfying the demand at the Surrey retail store at minimum cost. {2 marlcs)