2 electrical circuit problems. not that tough

two circuit questions
2 electrical circuit problems. not that tough

question 1 :
The Circuit is under sinusoid steady state. Find Vc the voltage across the capacitor expressed as a vector.
L= 100mH , R1= 500 ohm , R2= 1000 ohm , C 160 nF , Io= 4e^(j0) mA , w= 5000

question 2: everything is in the picture

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