Using python $$ functions $$

Assign this string to a variable:

This is a BINF $5403$ class $$ Fall $2018.$ It is a programming class. It is scheduled for every Tuesday$-12$pm to $3$ pm$.$

$1).$ Find the length of the string.

$2).$ Find the position of following the character $($Red color$)$ :

This is a BINF $5403$ class $$ Fall $2018.$ It is a programming class. It is scheduled for every Tuesday$-12$pm to $3$ pm$.$

$3).$ Find the occurrence of $-$M$$