Calculate the number of exemptions that could be claimed and the standard deduction that the taxpayer is entitled to take in 2018 in each of the following independent cases:

A) John, age 66, and his wife, age 64, file a joint return.

B) Jack, age 62 and blind, and his wife, who became 65 on January 1 of the following year, file a joint return.

C) Jim and Mary, both 52, contribute more than half the support for Jims father, who lives with them. Jims father is 72 and blind. Jim and Mary file a joint return.

D) Joe, age 65, and his wife, JoAnne, age 64, maintain a home for their unmarried daughter, age 23, who earned $4,000 and attends college on a part-time basis. Joe and JoAnne contributed $6,000 toward her support. Joe and JoAnne file a joint return.