3. The following data summarizes the grade that a student got in physics. Calculate the student's weighted average for the course. (3 marks) Category Student's Grade Category Weights Tests 80% 25% Assignments 95% 15% Quizzes 85% 10% Exam 80% 50% 4. Draw a tree diagram to illustrate the possible ways for Luna's family if they can travel from their home in North Bay to Toronto by bus or train, and then from Toronto to Halifax by bus, train, or plane. How many possible ways are there