please answer, thankyou

A total of 20 applicants came in for a job interview. Among them, four were 45 years old, six were 39 years old, three were 42 years old, five were 40 years old, and two were 35 years old. Let age of a randomly selected applicant. 1. What are the possible values for the random variable? 2. Construct the probability distribution for the random variable. 3. What is the probability that a randomly selected applicant is 35 years old? 4. What is the probability that a randomly selected applicant is older than a 43-year-old? 5. Draw the histogram for the probability distribution