3. Use Euler's method to approximate y('| .2), where y(x) is the solution of the initial value problem x231\" ny' + 2y = 0 ;y(1) = 4; y'(1)= 9 where x > 0. Use h=0.1. Find the analytic solution of the problem, and compare the actual value of y(1.2) with yz. 4. Repeat the above problem using the RK4 method