4. Use the weighted average method to compute the following. A). suppose there are four different assessments.10%homework,20%midterm,1, 20% midterm 2 and 50% final exam.what final exam scores in percentage do you need in order to get an overall percentage of 68%(at least a B) if you have 80% in the homework ,75% in midterm 1,80% in the midterm 2? B) consider the same course as in part (a) you got 90% in the homework ,70% in the midterm 1, 50%in midterm 2 ,and 60% in the final .what overall percentage do you get? 5. In each of the following situations (1).provide a description of thr most appropriate statistics , (2) identify the most appropriate graph to display the data,(3) briefly justify your answer. (A) the manager of cafeteria wanted to learn about the Langara's students daily spending at the langara cafeteria.A random sample of 50 langara students was drawn to investigate this. (B) the manager of the cafeteria wanted to find out the percentage of langara students who spend more than $10 per day at the cafeteria. A random sample of 50 langara students was drawn to investigate this