Problem 3: Betty and Bob are going to buy a statue from Art, the artist. They are offered 3 payments plans: a. $5000 paid now b. $2 500 paid now and $3000 paid in 1 year c. $6000 paid in 18 months. If rates are 10% per annum effective then algebraically find the plan that is Best, Next, and Worst for Betty and Bob. Be sure to find the monetary difference and have your final answers correct to 2 places after the decimal point. Problem 4: Boris invests $10,000 now and $4,000 in 1 year. 2 years from now his account balance is $18,000. Bela invests $6,000 now and $3,600 in 6 months. 1 year from now his account balance is $12,000. Algebraically determine, using compoiurd interest, who did better. Your final numerical answers which explain your response should be correct to 3 places after the decimal point