Write out each of the following sums and compute where possible. a. (sum_{i=1}^{3}left(a-b x_{i} ight)) b. (sum_{t=1}^{4}

Write out each of the following sums and compute where possible.

a. \(\sum_{i=1}^{3}\left(a-b x_{i}\right)\)

b. \(\sum_{t=1}^{4} t^{2}\)

c. \(\sum_{x=0}^{2}\left(2 x^{2}+3 x+1\right)\)

d. \(\sum_{x=2}^{4} f(x+3)\)

e. \(\sum_{x=1}^{3} f(x, y)\)

f. \(\sum_{x=3}^{4} \sum_{y=1}^{2}(x+2 y)\)