Determine the source current, Iₛ, in the circuit below if I₀ =1.56∠−55°A.
1Ω
│---------------/\/\/\------------│(-----------.--------------│
│ -j6.37Ω │ │
Iₛ ↑∼ ︴2Ω │
│ ↓ I₀ ︴20Ω
│ j15.7Ω ︴ │
│___________________________│________│