Problem 4: Betty and Bob buy a photo from Bertha. They wish to make three payments - one at 4 months, the next at 6 months, and the last at 12 months from now. The payment at 6 months should be 50% of the payment at 4 months and the payment at 12 months should be 150% of the payment at 6 months. If they all value the photo at $5,000 now then algebraically find how much each payment should be; based on a 12% per annum simple interest rate? You answer should be correct to 2 places after the decimal point. 5000 A. Payment at 4 months B. Payment at 6 months C. Payment at 12 months