The speed of college tennis player Jaron Jackson's first serve averages 125 mph, with a standard deviation of 4 mph. If the distribution of service speeds is normal, _______ percent of Jaron's serves will be less than 130 mph.

Please give your answer as a whole number (e.g. 34, 67, etc.).

The distribution of Jaron's serve speed is normal. Jaron's opponent today figures he can handle a serve speed up to 132 mph. If this is the case, what percent of Jaron's serves will his opponent not be able to handle?

Please give your answer as a whole number (e.g. 34, 67, etc.).

The distribution of Jaron's serve speed is normal. How fast does a serve have to be to be among the fastest 20 percent of Jaron's serves?

Please give your answer as a whole number (e.g. 34, 67, etc.).