Within 20 minutes of class:10 ÷ 50 = 20%;
Class 20-60 minutes: 35 ÷ 50 = 70%;
Class for more than 60 minutes: 5 ÷ 50 = 10%.
As shown in the figure: within 20-60 minutes, the number of people who spend more than 60 minutes is 50 10 35 5, accounting for a few percent of the class, 20% 70%10% (2) (10+35) ÷ 50 = 90%.
Answer: The number of people who meet the requirements in watching TV in this class accounts for 90% of the class.
So the answer is: (1)50, 20, 70,10; (2)90.