Consider the differential equation y' - 4y + 4y = 0. (a) Find ru, ru, roots of the characteristic polynomial of the equation above. ru,r2 = 2,2 Σ (b) Find a set of real-valued fundamental solutions to the differential equation above. yı(t) = n(2t) M yz(t) = e^(21) м (c) Find the solution y of the the differential equation above that satisfies the initial conditions y(0) = -1, y (0) = -1. y(t) = м