just answer with solution and explanation please

The following are scores of random Grade 10 learners in a 150-item test in Science and Math. Science Math 85 120 76 85 73 73 80 70 72 80 84 34 79 72 1. Solve for the mean of each subject. (Round off to the nearest whole number) 2. Complete the given table and compute for the standard deviation. Score Mean X (x - x) (x - x)2 X 3. Based on the results of items 1 and 2, on which subject performed better? Why? Which subject performed more consistently? Why? 4. On which subject the learners performed much better and/or some performed far worse than the average