solve this for me and fill the table : b$.$ Can an order for $900$ more units for delivery in week $6$ be accepted? Show the resulted ATP if the order is accepted.

$\backslash$begin$\{$tabular$\}\{|$l$|$c$|$c$|$c$|$c$|$c$|$c$|$c$|\}$

$\backslash$hline Week & $0$ & $1$ & $2$ & $3$ & $4$ & $5$ & $6\backslash \backslash$

$\backslash$hline Customer Orders & & $900$ & $1200$ & $1300$ & $700$ & $200$ & $100\backslash \backslash$

$\backslash$hline MPS & $500$ & $2000$ & & $2000$ & & $2000$ & $\backslash \backslash$

$\backslash$hline ATP & & & & & & & $\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$