The Croupier Says Yes

A croupier rolls a fair six-sided die behind a screen. You may ask her one yes/no question, and she answers truthfully with probability $\frac{3}{4}$ and lies (states the opposite) with probability $\frac{1}{4}$, independent of the roll. You ask whether the die landed on six, and she answers yes. What is the probability the die actually shows a six?