It is possible to name the days $0$ through $6$ where day $0$ is Sunday and day $6$ is Saturday. If you go on a wonderful he $5($a Friday$)$ and you return home after $10$ nights you would return home on day $1($a Monday$).$

Write an expression to calculate the return day, retDay, in the code below for any valid values for startDay and lenc

Original $-1$ of $1$

$1$ # startDay is an integer between $0$ an $6$ representing the day you leave $2$ startDay $=$

$3$

$4$ # lenofstay is an integer representing the number of day of the stay $5$ lenofstay $=$

$6$

$7$ # retDay is an integer between $$ and $6$ representing the day you get from your stay $8$ retDay $=$ # replace this comment with your expression #

$9$