2m Collinear Antenna Design Vector And Velocity ( Can Any 1 Help? Thanks)?

Vector and velocity ( can any 1 help? thanks)? - 2m collinear antenna design

P moves in a horizontal plane along the circumference of a circle with center and radius 3 m with an angular velocity by π / 4 radians per second, clockwise direction. Q moves in a plane on a circle with a radius of 2 m and the center is the same circle of the 1st on an angular velocity of π / 2 radians per second in the right direction. At 1 O, P, Q with P and Q, in the north west the magnitude and direction of the velocity of P found in comparison with Q. oriented
(a) after 2 seconds (ans: 3.93 m s-1, S53 ˚ 8'E)
(b) after 3 seconds (Answer: 5.09 m s-1 S19 ˚ 7'W)