When citing a source with multiple authors $($three or more$)$ in$-$text, what is the correct format to use AFTER you have done your $1$st initial citation of $($Author$1,$ Author$2,$ Author$3,$ & Author$4,$ Year$)?$

$($Author$1$ et al$.,$ Year$)$

$($Author$1,$ Author$2,$ et al$.,$ Year$)$

$($Author$1,$ Author$2,$ & Author$3,$ Year$)$

$($Author$1,$ Author$2,$ Author$3,$ & Author$4,$ Year, pg$.$yyy$)$