Consider a program that enables and uses the interrupt. Just after an interrupt cycle, it happens that M[O] = 768. The address of the first instruction of the ISR is AOD. 1. The address of the instruction at which the interrupt happened is: 767 2. The content of M[1] (in HEX) is: 4AOD 3. The content of the PC just after returning from the interrupt service routing and before fetching any instruction from the main program is: 768 A character is transferred from the keyboard into the INPR Serially