Consider the following convergent series. complete parts a through c below. summation from k equals 1 to infinity startfraction 1 over k superscript 5 endfraction∑k=1∞ 1 k5; nequals=2 a. use upper s subscript nsn to estimate the sum of the series. upper s 2s2almost equals≈1.031251.03125 (round to seven decimal places as needed.) b. find an upper bound for the remainder upper r subscript nrn. upper r 2r2less than< 0.0156250.015625 (round to seven decimal places as needed.) c. find lower and upper bounds (upper l subscript nln and upper u subscript nun, respectively) for the exact value of the series. upper l 2l2equals=nothing and upper u 2u2equals=nothing (round to seven decimal places as needed.)