Please answer in 5 minutes

Part II. Short-Answer Questions (27 points; show your work for partial credits) 4. (15 points) A mobile app designer has placed several apps on the Google Play Store. She has observed that her revenues from a particular download are described by a normally distributed random variable with mean equal to $1.5 and standard deviation equal to $0.25. (a) What is the probability that campaign a particular download gives the designer a revenue larger than $2