Please help, especially with determining the basis, thank you!

Three years ago, Adrian purchased 105 shares of stock in X Corp. for $14,490. On December 30 of year 4, Adrian sells the 105 shares for $11,340. (Leave no answers blank. Enter zero if applicable.)

b. Assume the same facts as in part (a), except that on January 20 of year 5, Adrian purchases 170 shares of X Corp. stock for $26,690. How much loss from the sale on December 30 of year 4 is deductible on Adrians year 4 tax return? What basis does Adrian take in the stock purchased on January 20 of year 5?