A 7-station transfer line has been observed over a 40-hour period. The process times at each station are as follows: station 1, 0.80 min; station 2, 1.10 min; station 3, 1.15 min; station 4, 0.95 min; station 5, 1.06 min; station 6, 0.92 min; and station 7, 0.80 min. The transfer time between stations = 6 sec. The number of downtime occurrences = 110, and hours of downtime = 14.5 hours. A proposal has been submitted to locate a storage buffer (capacity = 20) between stations 4 and 5 to improve line efficiency. Using the upper-bound approach, compute the line efficiency and production rate of the new buffer installed transfer line.