*9.115 In a particular design of the CMOS op amp of Fig. 9.40 the designer wishes to investigate the effects of increasing the W/L ratio of both Q1 and Q2 by a factor of 4. Assuming that all other parameters are kept unchanged, refer to Example 9.6 to help you answer the following questions: (a) Find the resulting change in VOV and in gm of Q1 and Q2. (b) What change results in the voltage gain of the input stage? In the overall voltage gain? (c) What is the effect on the input offset voltages? (Youmight wish to refer to Section 9.4).