a. If Dave had borrowed $320 for one year at an APR of 8 percent, compounded monthly, what would have been his monthly loan payment? Use Exhibit 1B-4. (Do not round your intermediate calculations. Round your final answer to 2 decimal places. Omit the "$" sign in your response.) PMT $ b. What would have been the breakdown between interest and principal of the fifth payment? Use Exhibit 1B-4. (Do not round your intermediate calculations. Round your final answers to 2 decimal places. Omit the "$" sign in your response.) $ Interest Principal to ta $