Write a function called "letter_grade" that has a type int input parameter 10 points called "points" and returns through an output parameter "gradep" the appropriate letter grade using a straight scale (90-100 is an A, 80-89 is a B, and so on). Return through a second output parameter ("just_missedp") an indication of whether the student just missed the next higher grade (true for 89, 79, and so on). 1 Add file