Billie Fruit lives in Alberta and her income fluctuates from year to year, ranging from over $320,000 to about $90,000. She has two investments of $20,000 each in shares, both achieving a return of 7 percent; one by dividend, the other by capital gain. a. Calculate the higher return on an aftertax basis if this is a high-income year (assume 31.71% tax on dividends and 24.00% on capital gains). What is the after-tax yield? b. Calculate the higher return on an aftertax basis if this is a middle-income year (assume 7.36% tax on dividends and 15.25% on capital gains). What is the after-tax yield