Statistics: The Normal Distribution and Standard Deviation

Below are questions regarding the weight of football players in the NFL. I need assistance in figuring out the following questions.

1. The weight of football players in the NFL is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. What is the probability that a randomly selected football player will weigh more than 243.75 pounds?

2. The weight of football players in the NFL is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. What is the probability that a football player will weigh less than 260 pounds?

3. The weight of football players in the NFL is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. What percentage of players will weigh between 150 to 250 pounds?

4. The weight of football players in the NFL is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. 95% of player weights are less than X pounds, therefore X is:

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