2.7-4. Find the inverse z-transform of each E(z) below by any method. a. E(z) = 0.5z2 (z-1)²(z-0.6) b. E(z) = c. E(z) = d. E(z) = 0.5 (z-1)(z -0.6)² 0.5z(z-0.7) (z-1)(z -0.6)² 0.5z(z -0.7) (z-1)(z 0.59)(-0.61)