During the lockdown 60% of senior schools delivered online classes through GoogleMeet platform and remaining 40% schools delivered the classes through other platforms like MicrosoftMeet, Zoom etc. In a survey to assess the effectiveness of online classes, 30% of schools that used GoogleMeet were satisfied and remaining schools were not satisfied with online classes. And, 20% of schools that used other platforms were satisfied with online classes and remaining 80% were not satisfied. A school is selected at random for in depth study on the impact of online classes. [Show all calculations and diagrams]. (a) If the school that was satisfied with online classes got selected, what is the probability that it used GoogleMeet? (b) If the school that was not satisfied with online classes got selected, what is the probability that it was using GoogleMeet? Q. Compute population variance and Z-scores of the following data. Show all calculations 1 3 5 7