QUESTION $9$

A signalized intersection has four phases. The y subscript c comma i end subscript are $0\mathrm{.}15,0\mathrm{.}19,,0\mathrm{.}21,0\mathrm{.}17$ for phases i equals $1$ to $4.$ respectively. If C equals $108$ seconds and L equals $16$ seconds, what is g subscript $2($to the next second$)?$

$23$ sec

$21$ sec

$25$ sec

$19$ sec