$R_{eq}=14\Omega$  

 $R_{eq}=8\Omega$  

 $R_{eq}=10\Omega$  

 $R_{eq}=24\Omega$  

1A

3A

4A

7A

$V_{R1\ }=8V\ ،\ V_{R2\ }=8V\ \ \ ،V_{R3\ }=8V\$ $.$

$V_{R1\ }=4V\ ،\ V_{R2\ }=10V\ \ \ ،V_{R3\ }=8V\$

$V_{R1\ }=9V\ ،\ V_{R2\ }=7V\ \ \ ،V_{R3\ }=0V\$

$V_{R1\ }=5V\ ،\ V_{R2\ }=3V\ \ \ ،V_{R3\ }=2V\$