Consider a particle following the parametric equations \( x =cos(4t), y = sin(6t)\)
as well as points \(P, Q, R, S\) : 
In the time interval from \(-\pi/4\) to \(\pi/4\) our particle visits point P at time p, visits point Q at times q1 and q2 such that \(q1 , visits point R at time r, and visits point S at time s. Answer with the values of the five variables p, q1, q2, r, s in that order.
