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irves in Question 1, 13.1.13 HW Score: 2%, 0.1 of 5 points Part 1 of 3 O Points: 0 of 1 Save The equation r(t) = (3t + 6) i+ (3t -3) j+ (2t) k is the position of a particle in space at time t. Find the particle's velocity and acceleration vectors. Then write the particle's velocity at t = 1 as a product of its speed and direction. . . . What is the velocity vector? v ( t ) = ( ) ; + ( D ; + ( ) k Sc 21