Robin Corporation, a calendar year C corporation, had taxable income of $700,000, $1.2 million, and $1 million for 2016, 2017, and 2018, respectively. Robin has taxable income of $1.8 million for 2018. The minimum 2019 estimated tax installment payments for Robin are:a.April 15, 2019, $52,500; June 17, 2019, $94,500; September 16, 2019, $94,500; December 16, 2019, $94,500.b.April 15, 2019, $52,500; June 17, 2019, $52,500; September 16, 2019, $52,500; December 16, 2019, $52,500.c.April 15, 2019, $94,500; June 17, 2019, $94,500; September 16, 2019, $94,500; December 16, 2019, $94,500.d.April 15, 2019, $52,500; June 17, 2019, $136,500; September 16, 2019, $94,500; December 16, 2019, $94,500.e.None of these choices are correct.