Refer to the photo below. The lower instrument is a tachometer, and the upper is a manifold-pressure gauge. In a climb, with a non-turbocharged engine swinging a controllable-pitch propeller, the manifold-pressure gauge should indicate a (_____) in manifold pressure (power) at the rate of approximately (_____) inch of manifold pressure for each 1000-foot gain in altitude. [Fill in the blanks with the best answers.]
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