A manual assembly line has 17 workstations with one operator per station. Total work content time to assemble the product = 22.2 min. The production rate of the line = 36 units/hr. A synchronous transfer system is used to advance the products from one station to the next, and the transfer time = 6 sec. The workers remain seated along the line. Proportion uptime = 0.90. Determine the balance efficiency.