please show excel fucntions please

(3) The worksheet Q3Gradebook has the following columns: Sequence Number, Student full nathe, 10 quiz scores, 10 points each, 3 sets of homework, total 142+94+62=298 points, 3 exams, 100 points each. ( 12 points) a. Separate each student's name into two columns, Last name and First name, using text functions learned in Special Topic 2. b. Sort the entire worksheet based on Last name. c. Calculate student average using the following formula and then assign a letter grade to each student based on the following grading scale. 298whichisthetotalavailableHWpointsSumofHWpoints,10 +90totalavailableQZpontsafterdroppoingthelowestoneSumofQuizpoints-lowestquiz10 +300whichistotalavailableexampointsSumofExampoints "Bo Grading Scale: A 90100% B+8789.99%C+77.79.99%D+=6769.99%F-below60%B8086.99%C=70.76.99%D=60.66.99% d. Use = COUNTIF statement to count how many As, Bs (including B+ and B ), Cs (including C+ and C ), and Ds (including D+ and D ) and F. (3) The worksheet Q3Gradebook has the following columns: Sequence Number, Student full nathe, 10 quiz scores, 10 points each, 3 sets of homework, total 142+94+62=298 points, 3 exams, 100 points each. ( 12 points) a. Separate each student's name into two columns, Last name and First name, using text functions learned in Special Topic 2. b. Sort the entire worksheet based on Last name. c. Calculate student average using the following formula and then assign a letter grade to each student based on the following grading scale. 298whichisthetotalavailableHWpointsSumofHWpoints,10 +90totalavailableQZpontsafterdroppoingthelowestoneSumofQuizpoints-lowestquiz10 +300whichistotalavailableexampointsSumofExampoints "Bo Grading Scale: A 90100% B+8789.99%C+77.79.99%D+=6769.99%F-below60%B8086.99%C=70.76.99%D=60.66.99% d. Use = COUNTIF statement to count how many As, Bs (including B+ and B ), Cs (including C+ and C ), and Ds (including D+ and D ) and F