please solve this for me urgently

4) An activity at Braemar International College of Spies is to see how many puzzles students can solve on a quiz. The scores of the 120 students are distributed normally. The average student scored 72% with a standard deviation of 4% a) What is the probability that a student will solve more than 82%? (2 marks) b) What percent of students are graded between 60% and 80%? (2 marks) c) How many students can solve between 709% and 8-4% puzzles" (3 marks) d) 90 students can score up to what percent