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Suppose a banker tells you that his bank in the year just completed had total interest expenses on all borrowings of $12 million and noninterest expenses of $5 million, while interest income from earning assets totaled $16 million and noninterest revenues totaled $2 million. Suppose further that assets amounted to $480 million, of which earning assets represented 85 percent of that total while total interest-bearing liabilities amounted to 75 percent of total assets. See if you can determine this bank's net interest and noninterest margins and its earnings base and earnings spread for the most recent year.