Find the solution of the following first-order differential equations. a) = 4 + 2 ; with y(0)=-1 (Use a step size of 0.5 on the interval [0,2]) b) = 3^4 4^3 + 2 1/ ; with y(1)=-4/10 (Use a step size of 0.5 in the interval [1,3]) To obtain the solution proceeds as follows: 1- Solve the first-order differential equation with Euler's method 2- Solve the differential equation of first order with the method of Runge Kutta of fourth order 3- Make a graph showing the answers of points 1 and 2 for each differential equation