$**$A$)$ In a DCF $($Distributed Coordination Function$)$ transmission using the DSSS method, CWmin is $5$ and CWmax is $127.$ Calculate the CW $($Contention Window$)$ values for the $2$nd and $4$th unsuccessful transmission attempts of a node. What is the range of values from which the node selects a specific number $($Backoff$-$BO$)?$

$**$B$)$ Assume that for IEEE $802\mathrm{.}11$g$,$ CWmin is $15$ and CWmax is $1023.$ Calculate the CW values for the first two unsuccessful transmission attempts of a station.$**$