ASAP help me

Assume that Emre Altu takes his children Uzay and Kuzey to a game park. They want to play with a toy gun. There is one single balloon as a target. Uzay will start the game and they will shoot in turn. If any of them shoots the target, then the game will be over. (For instance, if Uzay shoots the target in his first trial, Kuzey wouldn't be able to make any shoot). Uzay is more talented and he has a success rate of 50% to shoot the target whereas Kuzey has 40% success rate. The cost of each bullet is 20 . What is the value at risk in 95% confidence interval for Emre Altu, if he lets his children to play this game