Rain gauge X was out of operation for a month during which there was a storm. The rainfall amounts at three adjacent stations A, B, and C were 4.2, 3.7, and 4.9 in., respectively. The average annual precipitation amounts for the gauges are X -36.5, A-42.1, B 37.1, and C-398 in. The delta x and delta y values respectively for each station are X-0, 0; A-3,7; B-4, 6; and C-5, 9. Using a weighted average, estimate the amount of rainfall for gauge X.

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