Consider the following system of differential equations:
dx/dt + y = 0,
dy/dt - 2x - 3y = 0.
a) Write the system in matrix form and find the eigenvalues and eigenvectors, to obtain a solution in the form:
(x, y) = C1(1, y1)e^(λ1t) + C2(1, y2)e^(λ2t),
where C1 and C2 are constants. Give the values of λ1, y1, λ2, and y2. Enter your values such that λ1 < λ2.
b) Find the particular solution, expressed as x(t) and y(t), which satisfies the initial conditions x(0) = 4, y(0) = -5.