Determine taxable income in each of the following independent cases. In all cases, the company was formed in 2012, was very profitabie in all years prior to 2017, and had retained earnings of $3,000,000 at the end of 2017. Required: a. In 2018, Company A has taxable income of $60,000 prior to consideration of any net operating loss, In 2017, the company incurred a net operating loss of $10,000. It did not elect to waive the carryback period. Determine 2018 taxable income. b. In 2018. Company B has taxable income of $50,000 prior to consideration of any net operating loss. In 2017, the company incurred a net operating loss of $20,000. it elected to walve the carryback period. Determine 2018 taxable income. c. in 2021, Company C has taxable income of $35,000 prior to consideration of any net operating loss. In 2020 , the company incurred a net operating loss of $30,000 and elected to forgo the carryback period. Determine 2021 taxable income. d. In 2021, Company D has taxable income of $35,000 prior to consideration of any net operating loss. In 2017, the company incurred a net operating loss of $5,000. It elected to waive the carryback period. In 2018 , the company incurred a net operating loss of $40,000. In 2019 and 2020, the company had net income of zero. Determine 2021 taxable income