compute for the convolution of the following
a.
x(n) = {2,-4,2} arrow point at left 2
h(n) = {7,1,4,-4,-4} arrow point at 7
b.
x(n) = {6,-6,-2,3} arrow point at positive 6
h(n) = {1,0,-1,-1,} arrow point at 0
c.
x(n) = {1,1,2,1,1} arrow point at positive 2
h(n) = {5,-9,-1,4} arrow point at 4