3. A professor wants to research about correlation between their students' performance and time spent on watching web-series. The professor asked 7 students about how many hours per week they spent on watching web-series and their grades in the last test. Following plot indicates the ndings of this survey. 100 90 ,. y=-4.5845x+103.58 80 . R==0.9533 70 60 SO % on test 40 3O 20 10 O O 2 4 6 8 10 12 14 Weekly hours spent on wacthing webseries Using above chart, answer the following questions. a) Find the value of the coefcient of correlation, rounded to three decimals. [ 1 mark] b) Using this model, if a student spent 8 hours/week on watching web-series, what would be their score on the test, rounded to two decimals? [1 mark]