The nation of Fishkasar has a tax rate of 5% on the first 20,000 wallops (the national currency) fo taxable income, then 20% on the next 30,000 wallops, then 50% on all taxable income above the 50,000 wallops. Fishkasar provides a 5,000-walop exemption per family member.

a)Jamil's family has three members and earns 60,000 wallops per year. Calculate the family's marginal and average tax rates.