6. The circuit shown below is constructed using identical CMOS inverters. The channel width of the transistors is 14m. The channel length of the transistors is 1.2m. The equivalent resistances for the PMOS and NMOS transistors are 33k and 11k respectively. a) Calculate low-to-high propagation delay between V and V. b) Calculate high-to-low propagation delay between V3 and V2. c) Calculate low-to-high propagation delay between V4 and V1. Answer Vi V2 V3 V4