Go through the code below. Find IF ANY OO design principles are violated and explain your answer. If you find a violation, how will you refactor the code to solve the violation $?$

public class Shape$1\{$protected double side$1$;$$protected double side$2$;$$public Shape$1($double side$1,$ double side$2)\{$this$.$side$1=$ side$1$;$$this$.$side$2=$ side$2$;$\}$public void set$\_$side$1($double s$)\{$this$.$side$1=$ s;$\}$public void set$\_$side$2($double s$)\{$this$.$side$2=$ s;$\}$public double calculateArea$()\{$return side$1*$side$2$;$\}\}$public class Shape$2$ extends Shape$1\{$public Shape$2($double s$)\{$super$($s$,$ s$)$;$\}$public void set$\_$side$1($double s$)\{$this$.$side$1=$ s;$$this$.$side$2=$ s;$\}$public void set$\_$side$2($double s$)\{$this$.$side$1=$ s;$$this$.$side$2=$ s;$\}\}$public class Test$\{$public static void main$($String args$[])$ throws Exception$\{$Shape$1$ shp $=$ new Shape$2(5)$;$$shp$.$set$\_$side$1(6)$;$$shp$.$set$\_$side$2(3)$;$$System$.$out.println$($shp$.$calculateArea$())$;$\}\}$