$A2=4,P1=5$

$S1=1,P2=7$

$A3=8,P3=8S2=2,P4=10$ i need help calculating A$1$ and A$4$ and if you can slove the rest of it that would be good

$A2=4,P1=5$

$S1=1,P2=7$

$A3=8,P3=8$

$S2=2,P4=10$

$A1=A2+S1=4+1=5$

$A4=(A3+S1)-S2=9-2=7$

$F1=A1P1=55=25$

$F2=A2P2=47=28$

$F3=A3P3=88=64$

$F4=A4P4=710=70$

Fright $=F1+F3=25+64=89$

Fleft $=F2+F4=28+70=98$

Fstart $=FFl-Fr=98-89=9lbs($to the left$)$