questions below:

Find B and t for the space curve below. r(t) = (6 sin 2t)i + (6 cos 2t)j + 9tk 4 cos 2t 4 sin 2t 3 T= i - 5 5 + N = - sin 2ti - cos 2tj 8 K= 75 B = Di + ( D) ) + ( 0)k T= (Type an integer or a simplified fraction.)Find the velocity and acceleration vectors in terms of ur and ue. d6 r = a sin 26 and a = 2t, where a is a constant