John is a driver and his weekly income depends heavily on the weather condition. Assume each day can be classified as Rainy Day (20%) or non-Rainy Day (80%) and each day's weather is independent. John checks his past delivery history and estimates that he can earn 150 dollar on a rainy day but earns half the amount on a rainy day

1. what is his average weekly income he can earn?
2. What is the SD of the weekly income John can earn?