100 Metric tons of copper concentrate containing 21 wt.% Cu is to be processed in 6 months with 25 working days per month and 8 working hours per day. The concentrate is leached by sulphuric acid and electrolyzed in 10 cells arranged in series. The minimum current  rating  (Ampere  per  month  per  cell,  rounded  off  to   the   nearest   integer)   is ______.Given: Faraday constant = 96500 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 𝑝𝑒𝑟 𝑔𝑟𝑎𝑚 𝑒𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡. Atomic weight of copper is 63.