In the x versus t graph below, is there any time, or time interval, for which the following hold:

6. In the x versus t graph below, is there any time, or time interval, for which the following hold: a) v = 0 and a = 0, b) v= 0 and a # 0, c) v * 0 and a = 0, d) v > 0 and a > 0, e) v > 0 and a 0. x (m) -t (s) 12 A 6 8