Suppose the price of land in a city is given by the function P(x,y) = 144 - 10(x -_- 15(y - 1)2 where P(x,y) is the price of land at the point (x,y) in dollars per square metre and x and y are measured in kilometres. At what point within the city is the price of land highest? 0 (1, 2 ) O (1, 1 ) 0 ( -2 -2 ) 0 (2, 1) K None of the other answers O ( 2, 2 ) 0 ( 2 2 ) O (0,0)