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The graph to the right is the uniform probability density function for a friend who is x minutes late. O (a) Find the probability that the friend is between 20 and 30 minutes late. (b) It is 10 A.M. There is a 30% probability the friend will arrive within how many minutes? 1/30- Density 10 20 30X Time (min) (a) The probability that the friend is between 20 and 30 minutes late is (Type an integer or a decimal. Round to three decimal places as needed.) (b) There is a 30% probability the friend will arrive within minutes (Type a whole number.)