PLEASE HELP QUICK 100 POINTS WILL MARK BRAINLIEST. Your project must have your name, title, a PRE-IMAGE, Reflection over the y-axis, and a Translation of (x+15, y-20). PLZ PLZ HELP WILL GIVE BRAINLIEST TO CORRECT ANSWERS ONLY

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?