a. Suppose you will deposit the following amounts in your bank account. $2000 in year 1, 1500 in year 2, 2500 in year 3 and 1000 in year 4. If the interest rate is 4.5%, how much will you be able to withdraw at the end of 4 years? Do not write any symbol ($, #, &,...). Round your answer to the nearest one-hundredth percentage point. For example, write 1125.34 for $1,125.34.

b. Suppose you purchase an investment at a price of $4000. This investment will generate 2000 in year 1, 1500 in year 2, and 1000 in year 3. What is the implied interest rate? [Express your answer as a percentage. Round your answer to the nearest one-hundredth percentage point. For example, write 5.34 for 5.34%.