5E]; 52 IIII III -' Activity 1 Instructions: (1) Solve the problems given below. (2) Present a neat and orderly solution 1. The following data represent the amount in pesos spent on electronics device by a group of students during their 40 weeks of class. Find the mean and variance. 22 28 35 47 2. After giving grade to a quiz in M233, Engr. Galvez announced to the class the mean score was 68 points with the standard deviation of 12 points. However, a student brought to his attention that one of the questions in the quiz was incorrect and impossible to solve. As a result, Engr. Galvez agreed to add 10 points to the score of each student. Find the mean, the variance and the standard deviation of the new set of scores