In 2010 Casey made a taxable gift of $6.3 milion to both Stephanie and Linda (a total of $12.6 million in taxable gifts). Required: Calculate the amount of gift tax due this year and Casey's unused exemption equivalent under the following alternatives. (Refer to Exhibit 25-1 and Exhibit 25-2) (Enter your answers in dollars, not millions of dollars. Leave no answer blank. Enter zero if applicable.) a. This year Casey made a taxable gift of S1 million to Stephanie. Casey is not married, and the 2010 gift was the only other taxable gift he has ever made 2. 3 4 if tax due s 55 Unused exemption equivalent 76 b. This year Casey made a taxable gift of $16.3 million to Stephanie. Casey is not married, and the 2010 gift was the only other taxable 17 gift he has ever made 18 19 20 Gintax due 21 Unused exemption equivalent 22 23 c. This year Casey made a gift worth $16.3 million to Stephanie Casey is married to Helen in a common aw state, and the 2010 gire 24 was the only other taxable gift he or Helen has ever made. Casey and Helen elect to gin-split. 25 26 Casey's gift tax due 27 28 Casey's unused examption equivalent Helen's gift tax due 29 30 Helen's unused exemption equivalent 31 32 33