Considering the code below, at what time step will b=0 ? initial begin a = #10 1'b1; b = #20 1'b0; c = #40 1'b1; end Select one: O a. At time 70 O b. At time 30 O c At time 40 O d. At time 10 O e. At time 20 Which of the following has an XOR inverter that takes advantage of simplifying of the complements of functions? Select one: O a. PAL O b. PLA O . None of the given options O d. RAM O e. ROM