I am confused on how to solve this may you write in on paper so I can get a better understanding.

1. Compute the sums of the arithmetic sequences below using the sum formula. Check your work by adding up the numbers on a calculator. a) 22 + 28 + 34 + 40+ 46 b) 120 + 100+ 80 + 60+ 40 + 20 2. Compute the sums of the arithmetic sequences below by first determining the term number of the last term and using one of the arithmetic sum formulas. a) 8+10 + 12+ . ..+ 122 b) 20 + 15 + 10 + . . .+ -155 3. Evaluate (find the value of) the arithmetic series below. a) _ (5k -2) Am c) _ (7m - 2) d) _ (37-13)