Which of the following statements are true? Note you get $-1$ for a wrong answer, minimum mark for this question is $0.$Answer for part

Interrupts can be wired to any connection on the Arduino Uno.

You cannot change the value of global variables in interrupt service routines.

Interrupts should be attached in the setup part of the program.

Only one interrupt routine can be used in a program.

Interrupts are attached at the start of the program before the void setup$()$ function.

Variables used by interrupt routines need to be declared as volatile.