N N n (1 mark) Given 2 n2 = m, then the value of the series 6 Z: ((292 1)) + 1) is given by: 3:1 \":1 i=1 a) N2(N+ 1) +6N b) 2N(N+1) + SN 0) N(N+1)(N+ 2) +6N d) N(N 1) + 6N e) N(N + now + 1) + 6N