Let$$s Remind the $1$st question. Now suppose the bank has $100$ customers and every month the entrance rate increases by $5\%.$ But few of the customers retain in the long run. Thus, the percent of sustain is just $10\%.$ The manager found that each of actual customers deposit $$100$ in the bank every month. Moreover, $20\%$ of the customers are lender of which $10\%$ are bed debt customers. Draw the system and you can add any value or assume any value while building the design of the system