Required information [The following information applies to the questions displayed beiow.] Christina, who is single, purchased 480 shares of Apple Incorporated stock several years ago for $20,640. During her year end tax planning, she decided to sell 240 shares of Apple for $9,120 on December 30 . However, two weeks later, Apple introduced its latest IPhone, and she decided that she should buy the 240 shares (cost of $9,600) of Apple back before prices skyrocket Note: Leave no answers blank. Enter zero if applicable. a. What is Christina's deductible loss on the sale of 240 shores? What is her basis in the 240 new shares? Required information [The following information applies to the questions displayed below.] Christina, who is single, purchased 480 shares of Apple incorporated stock several years ago for $20,640. During her year-end tax planning, she decided to sell 240 shares of Apple for $9,120 on December 30 . However, two weeks later, Apple introduced its latest IPhone, and she decided that she should buy the 240 shares (cost of $9,600 ) of Apple back before prices skyrocket. Note: Leave no answers blank. Enter zero if applicable. b. Assume the same facts, except that Christina repurchased only 120 shares for $4,800. What is Christina's deductible loss on the sale of 240 shares? What is her basis in the 120 new shares