1. Find r'(t) and r"(t) for the function r(t) = eti + 2e-3 -de2t E. 2. Find a tangent vector at t = 7/2 for the curve r(t) = (2 sin(2t), 3 cos(3t), sin(t)). 3. Compute the indefinite integral of the function r(t) = ( Vt, cos( nt)