XYZ manufacturing department holding training class for all workforces due to safety and security concern. The average training day on the program is 50 days and the normally distributed random variable with standard deviation of 10 days.

1. What is the proximity that workforce selected at random will require more than 50 days of training? Show graph

2. What  probality that a workforce selected at random will take between 50 and 65 days to complete training? Show graph

3. What probality that a workforce selected at random will take between 42 and 57 days to complete training? Show graph