A=[-2 3 1; 3 -5 4; 2 5 3], b=[1;5;3], c=[-1 2 3] a. Suppose Ax=b. Find x b. Suppose yA=c. Find y. Consider the transfer function H(s) = n(s)/d(s) where n(s)= 5s^3 + 2s^2 + 13s + 9 d (s) = s^4 + 12s^3 + 45s^2 72s + 28 a. Find n(-12), n(-10), d(-12) and d(-8) b. Find H(-12) and H(-8). c. Let C(s) = s^2 + 3s +4/s^2 + 6s + 12 For what values of 's' does C(s)H(s) = 0? Plot a graph of the function. y = 3x^5 + 2x^3 + x^2 - 4 For 'x' values ranging from -10 to 10