if polygon MAST with coordinates M(-3,-1), A(-3,2),S (-1,3) and t (1,1) is reflected across x=-3, then which of the following coordinates represent the vertices of the polygon MAN'S'? select all that apply

Let 'a' be the point and 'A' be the reflection of point 'a' through line x= -3we know, (a+A)/2 (mid point of line aA) should lie on line x= -3so by using this, we calculate vertices of reflected shape of MAST, we get(-3,-1), (-3,2),(-5,3) and (-7,1)