A bank has studied its chequing accounts and found that 94% of all chequing accounts have been open for at least one year, the remaining percentage of chequing accounts have been open for less than a year. The bank also determined that for all chequing accounts that have been open for less than one year, the percentage of cheques returned due to insufficient funds is 4%. For chequing accounts that have been open for at least one year, only 1% of cheques were returned due to insufficient funds. (a) What is the probability that a cheque processed by this bank will be returned due to insufficient funds? (b) If a cheque is returned due to insufficient funds, what is the probability that it came from a bank account that has been open for more than one year? in this problem