Di = yl - m 2 + r + {n l + p\) - 2 i \/m* 17 — (,r + p|) (Y2 — m») , 



Â * 2 = R + ** ~~ {p ~ + 4 ( ' 2 ~ r2) V ~ pï) F 



S 2 =P 2= (/ 2 - p |) ( ^ +p |), ^"M 



c» ,■■,(■> #.>_ l\% i\ f F=^î± m, 

 sn«,Â- 2 )= ^ *VÇ2±J!!, 



Da - - w J + r 8 + (n« + g?) - 2 / vVn-t/^-f-^CVS- wr), 



* 3 â V f ^ + _ (/ '" ~ + 4 (/2 ,,2) (f2 - * 71» 



