Find both $I$ and $V_{bd}$ in the circuit shown given that $V_{ae} = 6 V, V_{bc} = 15 V, R_{ab} = 10 k\Omega, R_{cd} = 40 k\Omega$ and $R_{de} = 40 k\Omega$

$I =$ $mA$

$V_{bd} =$ $V$