On April 1, 2020, Jill's Dance Studio, Inc., an accrual basis taxpayer, received advanced payments totaling of $72,000 from various clients pursuant to three year contracts for dance lessons beginning on April 1, 2020 and ending on March 31, 2023. (a) Under general tax accounting rules, what amount must Jill's include in its gross income for the year ending December 31, 2020? Fully explain your answer. (b) Assume that Jill's wished to minimize the amount it included in its income for the year ending December 31, 2020, how may it do so, and what amount, if any, must it include in its income for the years ending December 31, 2020, December 31, 2021, December 31, 2022 and December 31, 2023? Fully explain your answer. (c) Assume that Jill's included $48,000 of the $72,000 in her financial statements for the year ending December 31, 2020. What amount must Jill's include in its taxable income for its 2020 tax year? Fully explain your