8. Convert the following expressions from infix to reverse Polish (postfix) notation.
a) X Y + W Z + V U
b) W X + W (U V + Z)
c) (W (X + Y (U V)))/(U (X + Y))
a) X*Y+W*Z+V*U
=> XY*+WZ*+VU*
=> XY*WZ*+VU*+
b) W*X+W*(U*V+Z)
=> W*X+W*(UV*+Z)
=> W*X+W*(UV*Z+)
=> WX*+WUV*Z+*
=> WX*WUV*Z+*+
c) (W*(X+Y*(U*V)))/(U*(X+Y))
=> (W*(X+Y*UV*))/(U*XY+)
=> (W*(X+YUV**))/(UXY+*)
=> (W*XYUV**+)/(UXY+*)
=> (WXYUV**+*)/(UXY+*)
=> WXYUV**+*UXY+*/