Looking for help with these

1. Determine the sum of each of the following arithmetic series a. 6 + 14 + 22 + ... up to 15 terms b. V2 + V8+ v18 + ... up to 13 terms c. 2 + 13 + 3 + .up to 10 terms d. -40-33 -26-... up to 31 terms e . f. 74 + 63 + 52 + ... up to 19 terms 18 3 11 _ 2 + ...up to 17 terms Rev. 2019-09 Page 8 of 11