12. Fred is single, and made $7,500 working part-time. Fred also has dividend and interest income totaling $8,000. Fred received $19,000 in social security benefits. Five years ago, Fred invested $100,000 in ABC Inc.'s stock, and is considering selling the stock for $115,000 which would result in a $15,000 gain. (12 points) a) Assuming Fred sells all the stock in the current year, calculate his AGI after taking any taxable social security benefits into account. (Show your work for full credit) b) Assuming Fred sells only half the stock in the current year, calculate his AGI after taking any taxable social security benefits into account. (Show your work for full credit) c) Would Fred be better off selling only half the stock this year and half the stock in the following year? Why or why not? Briefly explain your answer to receive full credit