: Write a function named evaluate$\_$grade that determines whether a student has passed or failed an exam. The function should have three parameters:

name $($positional$-$only$)$: The name of the student.

score $($positional$-$only$)$: The student's score on the exam. Assume this will always be an integer in the range of $0$ through $100.$

passing$\_$score $($keyword$-$only, with the default value $50)$: The minimum score required to pass the exam.

If the student's score is greater$-$than or equal$-$to passing$\_$score, the function should print the message $"$ passed the exam.", where is the value of the name parameter. Otherwise, it should print the message $"$ failed the exam.".

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evaluate$\_$grade$($name$,$score$,*,$passing$\_$score$=50)$:

$$if$$score$>=$passing$\_$score:

$$print$($f$"\{$name$\}$passed$$the$$exam$.")$

$$else:

$$print$($f$"\{$name$\}$failed$$the$$exam$.")$