This is a question about a wind turbine generator

a$)$ The blades of a $20$ kW$,400$ V machine rotate at $2$ revs per second at rated wind speed.

b$)$ The actual wind speed is lower than rated, so that the blades rotate at half the speed. The output voltage is now $190$ V

i$)$What is the induced emf at rated speed?

ii$)$ What is the emf at actual speed?

iii$)$What is the actual output current

iv$)$What is the actual power generated?