The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Determine the phase current IR.$

• A. (17.32-j10) A
• B. (-17.32-j10) A
• C. (17.32+j10) A
• D. (-17.32+j10) A