I'm in a rush and only need the answer no explanation thank you

Question 15 (1 point) The incomes in a certain large population of college teachers have a normal distribution with mean $60,000 and standard deviation $5000. Four teachers are selected at random from this population to serve on a salary review committee. What is the probability that their average salary is below $65,000? O a 0.0228 Ob 0.1587 Oc 0.8413 Od 0.9772