Find the first five terms of the sequence defined by each of these recurrence relations and initial conditions. a. an = 6an−1, a0 = 2 b. an = a2 n−1, a1 = 2 c. an = an−1 + 3an−2, a0 = 1, a1 = 2 d. an = nan−1 + n2an−2, a0 = 1, a1 = 1 e. an = an−1 + an−3, a0 = 1, a1 = 2, a2 = 0