please show all work for A,B and C.

Northwestern Bank (NB) offers only checking accounts. Customers can write checks and use a network of automated teller machines. NB earns revenue by thvesting the money deposited; currently, it averages 41 percent annually on its investments of those deposits. To compete with larger banks, NB pays depositors 0.3 percent on all deposits. A recent study classified the bank's annual operating costs into four activities. Data on two representative customers follow: Required: a. Compute the opetating profit for Nonthwestern Bank. b. Compute the profit from Emily and Jacob, assuming that customer costs are based only on deposits interest costs \\( =0.3 \\) percent of deposils: operating costs are 3.2 percent ( \\( \\$ 18,884,800 / \\$ 590.150 .000 \\) ) of deposits. c. Compute the profit from Emily and Jacob, assuming that customer costs are computed using the information in the activity based costing analysis