Sansuit Investments is deciding on future investments for the coming two years and is considering four bonds. The investment details for the next two years are given in the table below.

	Investment Requirements ($)
	Year 1	Year 2
Bond A	25,000	30,000
Bond B	15,000	21,000
Bond C	8,000	9,500
Bond D	10,000	7,000

The net worth of these four bonds at maturity is $60,000, $40,000, $25,500, and $18,000, respectively. The firm plans to invest $35,000 and $62,000 in Year 1 and Year 2, respectively. Develop ( write all the constraints) and solve a binary integer programming model with SOLVER for maximizing the net worth. Give your answer clearly.