5. Let E(x) = xn which converges for all x. A power series Cnx" can be found for n=0 n=0 E(x) 1+x n!' using power series multiplication. Find Co, C1, C2, C3, C4 of this power series. You do not need to find c5 and beyond, nor do you need to find a closed-form (non-power series) expression for E(x).