Consider the formula: $M=5s^2$

$($a$)$ Find the rate of change of $M$ with respect to s$.$ if $$ remains constant.

$($b$)$ Find the rate of change of $M$ with respect to $,$ if s remains constant,

$($c$)$ Find the rate of change of $M$ with respect to time $(l),$ if both $s$ and $$ are changing with respect to time.