4. Mr. and Mrs. Brock own a bakery. Their marginal tax rate on the bakery's income is 32 percent. The Brocks' 18-year-old daughter Megan works part-time in the bakery. This year, Megan earned $15,284 of wages, which was her only income. a. Compute Megan's income tax this year. b. Compute the Brock family's income tax savings from Megan's employment