Transformer circuit

See attached dwg (note in the center of the circuit is a transformer-ignore L1 AND L2 in the middle of the transformer, I put 2 inductors and 2 lines to simulate a transformer). Can you show me how to find Ix and Iy? The 10V is AC NOT DC. The resistors are 7 ohms and 4 Ohms. Thanks.

Three phase delta circuit

A 2400V balanced, three phase delta circuit (see attached) has phase load impedances of 40+j60 OHMS. What are IaA, IbB, and IcC? Note: That just as the current IaA shown on the attached, is the current flowing from node a to node A, the current IbB is the current flowing from node b to node B, and the current IcC is the current flowing from node c to node C.

Logic expression

See attached. I got this wrong on a quiz. What is the expression for the output, C? I say it was C=A XOR B Am I wrong?

Finding voltage and current.

See attached. My question is Vbg 3V or -3V.Is I2 1A or -1A?

Circuit current and voltages

Please see attached. By evaluating this circuit I find Vx=2.5V and I1=.75A and I2=.25A am I correct? Note R1=20 R2=10 R3=10 CURRENT SOURCE=1A DC VOLTAGE=10V