Classify the following random variables as discrete or continuous.
1. The number of cellphone units of GHI Mobile Company sold on a given day
2. The number of correct answers in a 50-item multiple choice test
3. The number of nonproductive hours in an eight-hour workday
4. The length of life (in hours) of a light bulb 5 . The number of vehicular accidents each year in Cainta, Rizal