2. (a) Consider the modified problem +6y2 y(0)-(0)--1. +4y 2cos t, with (LA.7) dt2 The ODE (L4.7) is very similar to (L4.4) except for the y2 term in the left-hand side. Because of the factor y2 the ODE (L4.7) is nonlinear, while (L1.4) is linear. There is however very little to change in the implementation of (L4.4) to solve (L4.7). In fact, the only thing that needs to be modified is the ODE definition. Modify the function defining the ODE in LAB04ex1.m. Call the revised file LAB04ex2.m. The