2. The following is a topographic map of a region around Sacagawea Peak in the Bridger Range (all units in feet): 5000 8800 8400 9400 1000 8600 8400 8600 3000 8800 9400 9200 2000 800 9000 1000 8800 8200 9000 8400 8000 9200 8600 7800 1000 2000 3000 4000 5000 We define the altitude function, A(x, y), as the altitude at a point r feet east and y feet north of the origin. (a) (1 Point) Estimate (1000, 3000) and (1000, 3000). (1000, 3000) ~ (1000, 3000) ~ ay (b) (1 Point) Use your partials in part (a) to estimate the altitude when x = 1100 feet and y = 2950 feet. A(1100, 2950) ~