A recent survey found the following distribution for the number of hours a person sleeps per night.

Hours of Sleep	Frequency
Less than 6 hours	12
6 Hours	26
7 Hours	30
8 Hours	28
More than 8 Hours	4
Total	100

Find the following Probabilities for a person selected at random:

• The person sleeps 8 hours per night
• The person sleeps fewer than 7 hours per night
• The person sleeps at most 8 hours per night
• The person sleeps at least 7 hours per night