How would an aircraft react with different wind conditions(given in the 'details' section)?

1)If groundspeed of aircraft is 80knots,and direct tailwind is 120knots.Which direction would a flag, hypothetically kept over the fuselage of the aircraft,fly ?
2)If groundspeed is 100knots and a DIRECT crosswind is of 100knots.
3)If aircrafts maximum speed on full throttle is 120knots and there is a 150knots direct headwind? Read more