pls explain step by step

3. Given the following: (1) Y(s)=(s1)(s+3)1 (ii) Y(s)=(s+100)(5s+1)e3s (iii) Y(s)=s2+s+62 a) For each case using the method of partial fractions, find qualitatively y(t) i.e. you do not need to compute the constants of partial fractions. b) Approximately sketch y(t) for each. c) Which responses (i.e. y(t) 's) are stable? Explain briefly