Select the correct statement$($s$)$ about the EM algorithm for GMMs$.$

In the $m^{th}$ iteration, the $(z_{nk})$ values are computed using the paramater estimates computed in the same iteration.

In the $m^{th}$ iteration, the $(z_{nk})$ values are computed using the paramater estimates computed in the $(m-1{)}^{th}$ iteration.

The ${}_k$ parameter estimates are computed during the $E$ step.

The ${}_k$ parameter estimates are computed during the $M$ step.