Only need help with exercise #8.Don't worry about 5,6,7.

Motion in the Plane In Exercises 5-8, r(t) is the position of a particle in the xy-plane at time t. Find an equation in x and y whose graph is the path of the par- ticle. Then find the particle's velocity and acceleration vectors at the given value of t. 5. r(t) = (t + 1)i + (12 - 1 )j, 1 = 1 6. r(t) = t t + 1 i + 7 j, t= 7. r(t) = e'i + zeatj, 1 - In 3 8. r(t) = (cos 2t)i + (3 sin 2t)j, t = 0