I only need the answer to C

According to Money magazine, Maryland had the highest mean annual household income of any state in 2018 at $75,847 (Time.com website). Assume that annual household income in Maryland follows a normal distribution with a mean of $75,847 and standard deviation of $33,800. a. What is the probability that a household in Maryland has an annual income of $100,000 or more (to 4 decimals)? b. What is the probability that a household in Maryland has an annual income of $40,000 or less (to 4 decimals)? c. What is the probability that a household in Maryland has an annual income between $50,000 and $70,000 (to 4 decimals)? d. What is the annual income of a household in the 90th percentile of annual household income in Maryland (to the nearest dollar)