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 15 and 20 minutes late. (b) It is 10 AM. There is a 20% probability the friend will arrive within how many minutes? (a) The probability that the friend is between 15 and 20 minutes late is . (Type an integer or a decimal. Round to three decimal places as needed.) (b) There is a 20% probability the friend will arrive within |:| minutes. (Type a whole number.) Density 1/30 0 0 1o 20 sex Time (min)