10 Problem 2-9 Discount factors a. If the present value of $154 is $140, what is the discount factor? (Round your answer to 4 decimal places.) 3 points Answer is complete and correct. 03:36:29 Discount Factor 0.9091 b. If that $154 is received in year 5, what is the interest rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Answer is complete but not entirely correct. Interest rate 0.93 X %