Question 2 (2 marks): The crash modification factor (CMF) for installing a traffic signal at a rural stop-controlled intersection is 0.23 for angle crashes (Harkey et al., 2008). If a specific stop-controlled intersection is to be converted to a signalized intersection and the expected number of angle crashes at this intersection without installing a traffic signal is 6.24 crashes per year, calculate the followings (Note: Show the unit of each value): (a) the expected frequency of angle crashes after the installation of a traffic signal (b) the percentage of expected reduction in angle crashes after the installation of a traffic signal