PLEASE HELP!!!

I cannot figure these questions out. I don't need an explanation all I need is the answer. Thank you so much for your help!

\fQuestion 18 The head nurse is trying to assign work positions for her nursing staff. If she has 12 nurses to ohoose from and she must assign a different nurse to each of 5 different rooms, how many ways can she place the nurses into the rooms? Question 19 The probability distribution of the number of taoos that Tom will eat in a single meal oan be seen below. What is the expected number of taoos that Tom will eat in a single meal? humix PEXJ 0.1 0.2 0.5 0.2 Question 20 2 Points Which of the following examples would be considered categorical data? A Number of hours a student studies for an exam. B Amount of weight lost after taking a weight loss drug. A list of career choices which yield the highest salary. D Wait time at the local DMV to receive a new driver's license. Question 21 2 Points An expensive restaurant claims that the average wait time for dinner is approximately 60 minutes. We suspect that this claim is inflated to make the restaurant appear more exclusive and successful. A random sample of 40 customers yielded a sample average waiting time of 50 minutes with a standard deviation of 10 minutes. Which of the following represents the appropriate null and alternative hypothesis? A Ho : u = 60, Ha: ut > 60 B Ho : u > 60, Ha: M = 60 Ho: u = 60, Ha: u # 60 Ho : u = 60, Ha: u