Three single-phase two-winding transformers, each rated 27 MVA, 33.0/13.2 kV, are connected to form a three-phase Δ–Δ bank. Balanced positive-sequence voltages are applied to the high-voltage terminals, and a balanced, resistive Y load connected to the low-voltage terminals absorbs 81 MW at 13.2 kV. If one of the single-phase transformers is removed (resulting in an open-Δ connection) and the balanced load is simultaneously reduced to 46.7 MW (57.7% of the original value). (a) Determine the load voltages Van, Vbn, and Vcn. (Assume that Van is the reference. Enter your answers in polar form in kV. Enter the phase angles in degrees.) Van= ∠ ° kVVbn= ∠ ° kVVcn= ∠ ° kV (b) Determine load currents Ia, Ib, and Ic. (Enter your answers in polar form in kA. Enter the phase angles in degrees.) Ia= ∠ ° kAIb= ∠ ° kAIc= ∠ ° kA (c) Determine the MVA supplied by each of the remaining two transformers. (Assume that transformers bc and ca remain. Enter your answers in polar form in MVA. Enter the phase angles in degrees.) Sbc= ∠ ° MVASca= ∠ ° MVA Are balanced voltages still applied to the load? YesNo Is the open-Δ transformer overloaded? YesNo