Answer the following questions $($each question is worth $1$ mark$)$:

$-$Define operator precedence and operator associativity.

$-$What is a mixed$-$mode expression?

$-$What is the role of the default segment in a switch statement?

$-$What is a loop variable? What is stepsize?

$-$What is the difference between a pretest version and a posttest version of a logical loop?