Suppose that the temperature Tat every point (x,y) in the cartesian plane is given by the formula T=1?x^2+2y^2.The correct statement about the maximum and minimum temperature along the line x + y = 1 is :(a) minimum is - 1, there is no maximum.(b) maximum is -1, there is no minimum.(c) maximum is 0, minimum is - 1.(d) there is neither a maximum nor a minimum along the line.