$4\mathrm{.}4\mathrm{.}6$: If$-$else expression: Operator chaining.

Variable user$\_$grade is read from input. Use operator chaining to complete the if$-$else expression as follows:

If the value of user grade is between $9$ and $12($both inclusive$),$ then $"$in high school" is output.

Otherwise, "not in high school" is output.

Ex $1$: If the input is $10,$ then the output is:

in high school

Ex $2$: If the input is $8,$ then the output is:

not in high school

Note: user$\_$grade is between $9$ and $12($both inclusive$)$ when $9$ is less than or equal to user$\_$grade, and user$\_$grade is less than or equal to $12.$