17. Indicate whether a company sustains a gain or loss in purchasing power under each of the following conditions.

(a) A company maintains an excess of monetary assets over monetary liabilities during a period of increasing general price levels.

(b) A company maintains an excess of monetary' liabilities over monetary assets during a period of increasing general price levels.

(c) A company maintains an excess of monetary assets over monetar\^ liabilities during a period of decreasing general price levels.

(d) A company maintains an excess of monetary liabilities over monetary' assets during a period of decreasing general price levels.