6b. A four-leg signalized intersection operates pre-timed, with two timing stages (NB/SB and EB/WB), permissive left- and right-turns, and a left turn lane and a shared thru/right lane on each approach. The analysis flow rate for the EB thru/right lane group is 375 vehicles/hour. The saturation flow rate for the EB thru/right lane group is 1750 vehicles/hour. The cycle length is 75 sec and the effective green time for the EB movements is 18 sec. (Assume the analysis duration period T is 0.25 hours, delay adjustment factor k is 0.5, and upstream filtering/metering adjustment factor I is 1.0. Assume there is no delay d3 due to initial queue.) Answer the following questions about the EB thru/right lane group. What is the volume-to-capacity (v/c) ratio? (Round to the nearest hundredth (0.01).) What is the average delay per vehicle (in sec)? (Round to the nearest integer.) What is the level-of-service (letter)?