Two particles  move on a circular path (one just inside and the other just outside) with angular velocities $\omega$  and  $5\omega$ starting from the same point 

p)	If angular velocities are in the same sense, they cross each otherat regular intervals of time=	1)	$\frac{\pi }{3\omega }$
q)	If angular velocities are oppositely directed, they cross each other           at regular intervals of time=	2)	$\frac{\pi }{2\omega }$
r)	If angular velocities are in the same sense, they cross each other              at points on the path subtending an angle of ____at centre	3)	${60}^0$
s)	If angular velocities are in the opposite sense, they cross each other         at points on the path subtending an angle of ____ at centre	4)	${90}^0$