3.1 Classify the following random variables as discrete or continuous:

X: the number of automobile accidents per year in Virginia.

Y : the length of time to play 18 holes of golf.

M: the amount of milk produced yearly by a particular cow.

N: the number of eggs laid each month by a hen.

P: the number of building permits issued each month in a certain city.

Q: the weight of grain produced per acre.