a) The contour diagram of the function f(x, y) is shown below.

At the point corresponding to (2,1) is the function increasingdecreasing withorrespect to x? At the point corresponding to (4, 2) is the function increasingrespect to y?decreasing withor (c) Suppose a bug is walking along the graph of f(x, y). If the bug walks in a straight line from the point corresponding to (1,3) to the point corresponding to (4, 1), is the bug walking uphill or downhill?