$T$ Flipflop sequence $1\rightarrow0\rightarrow1\rightarrow0\rightarrow1\rightarrow0 $ so $Q'=1$ enabled
$Johnson$ Counter : $101\rightarrow010\rightarrow101\rightarrow010\rightarrow101\rightarrow010(Q_2Q_1Q_0)$
$Ring$ Counter : $1010\rightarrow0101\rightarrow1010\rightarrow0101\rightarrow1010\rightarrow0101(Q_3Q_2Q_1Q_0)$
$\{f,b,d\}$ are enabled. making $7$ as decimal value.