what is christina's deductible loss on the sale of 100 shares? what is her basis in the 50 new shares?

Christina, who is single, purchased 200 shares of Apple Incorporated (Nasdaq: AAPL) stock several years ago for $11,400. During her year-end tax planning, she decided to sell 100 shares of Apple for $5,200 on December 30. However, two weeks later, Apple introduced lis latest IPhone, and she decided that she should buy the 100 shares (cost of $5,400) of Apple back before prices skyrocket. Note: Leave no answers blank. Enter zero if applicable. Assume the same facts, except that Christina repurchased only 50 shares for $2,700. What is Christina's deductible loss on the sale f 100 shares? What is her basis in the 50 new shares