Bill is 50 and is tired of working. He has the opportunity to stop working full-time and only work part-time until he is 65 (in 15 years). Bill would earn just enough money to live off of without using any of the funds in his portfolio, but he also wouldn't be able to save anything else for retirement. If his portfolio is currently worth $1,500,000 and earns 8% returns on average, how much will it be worth in 15 years if he neither adds to or takes money out of it? (Round to the nearest hundred thousand) a. $2.2 million b. $2.7 million c. $3.6 million d. $4.8 million