3. How does your program call the PORTD_IRQHandler function when a PortD interrupt is triggered? Describe the mechanics between hardware generating an interrupt signal and code executing the correct ISR function. For example, what stops a different function from being called? 4. When configuring the GPIO interrupt mode in Exercise 2, we performed bit manipulation of the IRQC field in PORTD->PCR using the "" operator. This choice relies on one critical assumption Describe this assumption and why it is critical (what can go wrong). As a hint, imagine some other code segment had configured PortD for logic 1 triggered interrupts (rather than rising edge) before your code was executed. 5. Describe two advantages of using the Sys Tick ISR for periodically executing code as opposed to a main loop with blind-cycle delays. 3. How does your program call the PORTD_IRQHandler function when a PortD interrupt is triggered? Describe the mechanics between hardware generating an interrupt signal and code executing the correct ISR function. For example, what stops a different function from being called? 4. When configuring the GPIO interrupt mode in Exercise 2, we performed bit manipulation of the IRQC field in PORTD->PCR using the "" operator. This choice relies on one critical assumption Describe this assumption and why it is critical (what can go wrong). As a hint, imagine some other code segment had configured PortD for logic 1 triggered interrupts (rather than rising edge) before your code was executed. 5. Describe two advantages of using the Sys Tick ISR for periodically executing code as opposed to a main loop with blind-cycle delays