[" Find the equation of the circle passing through the points "(2,3)" and "(-1,1)" and "],[" whose centre is on the line "x-3y-11=0" ."],[" Find the equation of the circle with radius "5" whose centre lies on "x" -axis and "],[" passes through the point "(2,3)" ."],[" Find the equation of the circle passing through "(0,0)" and making intercepts "a" and "]