Begin with the graph of Y = -x^2 + x. Write an equation that would reflect it in the x-axis and translate it 3 units up

Mọi người giúp mình giải bài này với ạ. Mình đang cần gấp lắm luôn 
 A. The graph of Y= x^2+ 2 is expanded horizontally by a factor of 2, then shifted 4 units left and 3 units down. What would be the resulting equation? 
B. Begin with the graph of Y=-x^2+x. Write an equation that would reflect it in the x-axis and translate it 3 units up. 
C. Given the equation x=y^2, write an equation which does the following to its graph:
    - Reflects it in the line y=x
    - Horizontally expands by the factor of 3
    - Translates it 2 units down. 
D. Given the equation y=x, write an equation which transforms its graph as follows:
   a) Compresses the graph horizontally by a factor of 1/2
   b) Reflects it in the x-axis.