(2 points) (a) Compute s4 (the 4th partial sum) of s=∑n=1[infinity]6910n5 : s4= Note: if giving a decimal approximation to this part, you may need to enter more digits than usual. (b) Estimate the error in using s4 as an approximation of the sum of the series (i. e. use ∫[infinity]4f(x)dx≥R4 ): Estimate = (c) Use n=4 and sn+∫[infinity]n+1f(x)dx≤s≤sn+ ∫[infinity]nf(x)dx to find a better estimate of the sum: ≤s≤ Note give each answer accurate to (at least) five decimal places.