(1 point) From the textbook: Two investment options are as follows. Choice 1: Payments of $ 2500 now, $ 3200 a year from now, and $3990 two years from now. Choice 2: Three yearly payments of $ 3200 starting now. Assume interest is compounded continuously. HAHA (a) If the interest rate on savings were 4.75 %, which would you prefer? 1 (Type in 1 for Choice 1, or 2 for Choice 2.) (b) What is the interest rate that would make both choices equally lucrative? . % (1 point) From the textbook: Assume a substance is reduced by 22% in 32 hours. What is the substance's half-life? hours (Feel free to use a non-whole-number of hours; i.e., use decimals.) Hint: (1 point) From the textbook: Assume a quantity decreases by 5.4% in 8.5 hours. What is the half-life of the substance? hours (Your answer should be accurate to two decimal places.)