Is i an element of the i-th subset?) 5. Compute the closed form for each of the following. Write each as a number or a polynomial in n. Note that the closed form solution of each will not have a summation in it. For example, the closed form for ' i i is n2+ n Also, be sure to expand your polynomials. For example. _i i should be written as 2 + and not as (n + 1) Be sure to show your work. (a) -255, where n is a positive integer whose value is at least 25 (b) -16(i +3) (d) ,73331 (e) -1 (29-n + 3)