$$\left. \begin{array} { l } { C = \{ - 1 , - \frac { 1 } { 2 } , \frac { 3 } { 2 } , \frac { 3 } { 2 } , 2 \} , A - ( B ) = ( A - B ) , ( A - C ) } \\ { A - ( B n C \right.$$
$a=-\frac{1}{2}=-0.5$
$b = \frac{3}{2} = 1\frac{1}{2} = 1.5$
$c = \frac{3}{2} = 1\frac{1}{2} = 1.5$
$d=2$
