In recent years a new type of taxi service has evolved in more than 300 cities worldwide, where the customer is connected directly with a driver via a smartphone. The idea was first developed by Uber Technologies, which is headquartered in San Francisco, California. It uses the Uber mobile app, which allows customers with a smartphone to submit a trip request which is then routed to a Uber driver who picks up the customer and takes the customer to the desired location. No cash is involved, the payment for the transaction is handled via a digital payment. Suppose the weekly income of Uber drivers follows the normal probability distribution with a mean of $1,000 and a standard deviation of $ I 00. What is the z value of income for a driver who earns $1,100 per week? For a driver who cams $900 per week? What is the likelihood of selecting a driver whose weekly income is between $ I,000 and $1,100?