Consider the following system of differential equations 13 dI + 241 + 77 dy dt at + 144y = 48t2 + 74t + 40 dx _ 31 +6 dy - 17y = -5t2 - 2t - 5 dt dt In addition, we have the following initial conditions y(0) = 13, dy dt (0) = -85. Let r(t), y(t) be the solution of this IVP. Find (t) = i zi y( t) =