Having trouble solving these

Problems 16 to 21 refer to matrices AB and Ac. Let B and C be bases of R' and let the matrix of a linear transformation be As and Ac respectively, and let S be the standard basis. Let: 1 0 2 AB = 2 -1 Ac = 0 1 0 0 1 1 0 3 16. Which one of the following is Ass? 3 -2 -1 3 2 0 (A) B -1 10 (C) 1 1 0 D 1 0 01 1 0 1 17. If v= which one of the following is [v]B? atb 3a-2c (A) nop B) (C) h D) 3a+2b-c -2atb -2atb 2a-btc -atc 2a-btc 18. If v= nop which one of the following is AB[v]B ? -atb 3a-2c A B) 3a-2b-c -2att (C) b D -atb 2a-b+c atc 19. If which one of the following is [v]c ? 2a-c 3a-2c (A) B 3a-2b-c h (C) h D) -atb atc atc