Consider the sequence below. {and, = (1,0, -1, 1,2, -1, 1,4, -1,... } Let s, denote the nth partial sum of ) on. n=1 (a) Graph the sequence {a, } on the axes below. (b) Graph the sequence {s, } on the axes below. 7 -4 3 -3 -2 1 2 3 4 9 10 3 4 --1 B 9 10 -1