[ n ] 



a;* = ^s _ ej-* + I a^ — 8 



x—y-Vz 7«* 7JC* — 28:>'+ 28 



16^ idy — 32 



12 + 12 



J,J +^z 



= 



*.*J'= — I •.•« = --3, — 2, — 2- 



