t 0 3 6 9 12 f (t) 27 24 22 21 20 (a) Ifn = 4, what is At? What are to, 1, 12, 13, t4? What are f (to), f (t1), f (t2), f (13), f (t4)? At = HI 3 to = f (to) = i 27 t1 3 f (1 1 ) = 24 12 = f (12 ) = i 22 13 = 9 f (13 ) = 21 12 f (t1 ) 200(b) Find the left and right sums using is = 4. Left sum n Right sum n (c) If n = 2, what is At? What are to, 1, t2? What are f (to), f (t1), f (t2)? At = i to = HI f (to) = 11 = i f (1 1 ) = i 12 = 1 f (12 ) = i(d) Find the left and right Sums using n = 2. Left sum n Right sum n