The distribution of the weights of patients at a local urgent care clinic is Normal, with a mean of 150 pounds and a standard deviation of 10.6 pounds.

(a) What percent of patients weigh less than 130 pounds?

(b) What percent of patients weigh at least 160 pounds?

(c) What percent of patients weigh between 135 and 175 pounds?

(d) What weight cuts off the bottom 15% of patient weights at this clinic?