Please help will give the brainliest 
Find the coordinates of the vertices formed by the system of inequalities.  
 X≤ 3
 -x + 3y ≤ 12
 4x + 3y ≥ 12 
A (0, 3), (4, 0), (5, 3) 
B (3, 0), (0, 4), (3, 5)
C (-3, 3), (1, 3), (0, 4) 
D (3, -3), (3, 1), (4, 0)
2.  At What point is the maximum value found in the system of inequalities graphed below for the function f(x, y) = x - 2y?
A (0, 3)
B (0, 0)
C (5, 0)
D (5, 3)
                                             
                                          
                                          
                                        
											