Problem
1. Give a C statement to declare low-ISR as the low-priority interrupt service routine and inform the C compiler to generate an instruction sequence to save the PRODL and PRODH registers in the software staclz.
2. Describe how you would avoid corrupting the STATUS, WREG, and BSR registers when both the low- and the high-priority interrupts are enabled. Describe how you can achieve this in your low- or high-priority interrupt service routine.