F=aF4apmpmpm§F
¤Fs¤mFsnnn 1-127QQQ_¢_Q¬
Fp¦FVFmphp¦F¤zp¢"VFm""ahFamp"=F=a4"F=
¤m¤F=zdacadd"m=^Fmhp¦F^F"VFm*"4camp^Fzdacadd
p¤4"mF^a¤z¤amV^FahF"*dFpm"h"m¤"d_4^F=¤dF=*"ap
"4a¦"F§^Fm^F^"*FFmFpF=pF¦a4F"OF"O"ad¤F
FpdpV^FdpVVF=_p¤"VFm*"4cam¦a"dpVamF¤F
hF"VF
Considerations
4"mahFp¤§^adF"m"VFma"4¤"dd©"^FFham"daO^F"VFm
=pFmp"m§FppmFmp¤V^p^"FdF4F="mp^F§pchp=F§^adF"
4"ddaamVamV^"m=dF^F4"dd"¤¤"d:h"camV^F"VFm
¤m"¦"ad"*dFa^zda:"VFm"h¤daO¤m4apmFham"dcmp§^"
^F©^"¦F*FFmh"=F¤m"¦"ad"*dF§^Fm^F©FF^F_pcd"hzda
^F©zF^F¤p_mp"m¤"d_m*¤pmp*F4phF"¦"ad"*dF
zF4aO©"4p¦F"VFz"^pOpF=aF4apmOpmpm¦F4p_4pmpddF=
zdapOppVa4"dVFm§a^aF4VFm"ddpFm¤F^"
4"dd"F"d§"©F=aF4F=
Interactions

F§a^Opmpm_"=b¤m4_4pmpddF=zda
"zzda4"apmaVmpmd©p^¤mVp¤z^Fm"dddamFam"
¦F4p_4pmpddF=zda"FdpVVF=p¤:^Fzdaa4pma=FF=
¤m"¦"ad"*dF:"m=¦F4pzp4FamVcaz^FFzam^F¦F4pOpmF§
4"dd
Op44¤pm^Fd"zpam"mzda:^F4"ddamp
F¤F¤F=p^F4pm¦FFzda:*¤azp4FF=*©^FmF¨¦F4pFz
m©4"dd¤F¤F=p"zda^"^"*FFm"cFmp¤pOF¦a4Fh"©*FdFO
"^azda^Fm^F©FhFamaa"da«F:"dd*¤aF=_p¤zp"F
"¤ph"a4"dd©dpVVF=*"4camp^FzdaF§4"dd4"¤F"
ahFp¤aO^F"=b¤m4p"VFmadd=pFmp"m§F"OF^F©Fh
Famaa"da«F
*"m=pmF="ddF"4^
*"m=pmF="ddF"4^:aO=FOamF=Op"¤mc:aF"zzdaF=p4"ddpm^"
¤mc^"F¤F¤F=§^FmF¦F^F4"dd"Fp¤F=p"mp^F"VFm
VFmamh¤dazdFzda
^Fm"ahFp¤p44¤:"mzda"VFmazd"4F=am§pc
hp=F§a^mpaOa4"apmpOp"ddzda^"^F"VFmadpVVF=amp
^F"VFmaFzpma*dFOp*F4phamV"¦"ad"*dFamF"4^zdam"m:
"VFm"FdpVVF=p¤pO"ddzda^"^F©"FdpVVF=amp p¤h¤dpV
"VFm*"4camp^Fzda