1. Solve the following below
A) Use the second derivative test to find all the local maxima,
local minima and saddle points of f(x,y)=x^2 +xy+y^2 +y
B) Find the absolute minimum and maximum values of f (x, y) =
x^2 + y^2 − 2x on the closed triangular region with vertices (2,
0), (0, 2) and (0, −2). [First find interior critical points, then
critical points on the boundary, i.e. on each edge of the triangle.
Finally, include the vertices...