$2-$ A belt drive consists of two V$-$belts in parallel on grooved pulleys of the same size. The angle of the groove is $(30),=0\mathrm{.}12.$ The resultant force divided by the power and linear velocity of each belt is $(7\mathrm{.}258kN),$ The tight and slack tension is

$($a$)4\mathrm{.}750kN,1\mathrm{.}105kN$

$($b$)5\mathrm{.}750kN,1\mathrm{.}105kN$

$($c$)4\mathrm{.}750kN,2\mathrm{.}105kN$

$($d$)5\mathrm{.}750kN,2\mathrm{.}105kN$