Calvin is 3 years younger than Robert. Which expression below represents how old Calvin is if Robert is y years old? A) y - 3
B) y + 3
C) 3 - y
D) 3 + y

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?