Answer:
We could see the graph of all of the three questions of the quadrilaterals as is attached with the answer.
Ques 14)
The vertices of quadrilateral is given as:
W(-1,1),X(0,2),Y(1,2),Z(0,-2)
Ques 15)
The vertices of the quadrilateral is given as:
R(-2,-3) , S(4,0), T(3,2) and V(-3,-1)
Ques 18)
The vertices of the quadrilateral are given as:
E(-3,1), F(-7,-3) ,G(6,-3) and H(2,1)