3. (a) (5 points) Find all singular points in the complex plane for the equation (4 + 1:2)xy\" + :ry' + 3223; = 0. (b) (5 points) If one attempts to solve the initial value problem (4 + :82)xy\" + :L'y' + $23; = U, x. y(2) = 0, y'(2) = 1, by an expansion of the form 3; = Z on(m 2)", use the result of part n=0 (8.) to nd a. lower bound for the radius of convergence of the solution