QZ: The temperature at a point in a unit square. Please see the attached file for full details.

QZ: The temperature in a unit square Osu=1, osys1 at a point (my ) is given by the function T( my) that Satisfy T ( 1/2, 1 /2) = 10 & ay ( 1/2 , 1/2 ) = - 1 . What is the change in temperature if the Point ( 1/2, 1/2 ) is moved a bit in the direction Of the origin (0, 0)? In which direction should the point be moved for maximum temperature