The transfer function of a circuit is of the form
H(s) = (s+4)(2s+1)/(s+1+j1)(s+1-j1)
a. Express the transfer function in descending powers of s with the coefficients of the highest power of s unity in both the numerator and denominator.
b. Determine where the poles and zeroes of the transfer function are located.
c. Is this the transfer function of a causal system?