$\backslash$table$[[$Bitumen content $(\%),$Stability $($kg$),$Flow $($units$),$Vv $(\%),$VFB $(\%),$Gm$],[3\mathrm{.}5,960,2.\mathrm{.}05,4\mathrm{.}8,56\mathrm{.}3,2\mathrm{.}32],[4,980,2\mathrm{.}42,4\mathrm{.}2,66\mathrm{.}14,2\mathrm{.}33],[4\mathrm{.}5,1120,3\mathrm{.}6,3\mathrm{.}8,73\mathrm{.}92,2\mathrm{.}34],[5,1050,4\mathrm{.}53,3\mathrm{.}16,79\mathrm{.}08,2\mathrm{.}35],[5\mathrm{.}5,950,5\mathrm{.}6,2\mathrm{.}75,82\mathrm{.}33,2\mathrm{.}33]]$

$1-$ Find bitumen content corresponding to Max stability.

$2-$ Find bitumen content corresponding to Max Gm$.$

$3-$ Find bitumen content corresponding to $4\%$ percent air void.

$4-$ Find The optimum bitumen extent.