The graph to the right is the uniform probability density function for a friend who is x minutes late. (a) Find the probability that the friend is between 5 and 15 minutes late. (b) It is 10 A.M. There is a 50% probability the friend will arrive within how many minutes? (a) The probability that the friend is between 5 and 15 minutes late is (Type an integer or a decimal. Round to three decimal places as needed.) (b) There is a 50% probability the friend will arrive within minutes. (Type a whole number.)