Q.2 (MCcQ) Let f: R R be a function such that y = f(r) be the solution of the following differential equation ytan- ) -0 then f(r) is 1. one-one and onto. 2. one-one but not onto. 3. onto but not one-one. 4. neither one-one nor onto. Q.3 (MCQ) The following differential equation has 6iydr - r(r+2y)dy =0; y0)= 1. no solution. 2. exactly one solution. 3. exactly two solutions. 4. infinitely many solutions.