1 2 2˥X 8X 5 (6X3 X 3  X232(6X3 X2  3 8X2 8X 2 0   X X3 2 1(2 1X 2       223 4 2

1.020.5 L: 1 

2

2

˥x 8x 5 (6x3 x 3 

x

2

3

2

(6x3 x

2

 3 8x

2

8x 2 0   x x3 2 1(2 1x

2

      

2

2

3 4 2