Let y = f(t, r, p, Vo, Yo) be the solution of the following problem, where p, yo > 0 and r, vo 20 are parameters, and [t] = T and [y] = Y. =o= Vos yle=o=yo, t0. dy dt2 =r-py, dy dt (a) Find a set of associated scales for t, y involving only p, yo > 0. (b) Find the scaled problem and show that it contains two independent dimen- sionless parameters 1.2. (c) Find the solution y = (1, , ) of the scaled problem.