So this is 20 liters. And we wanna know what is the probability that Shinji runs out of fuel? Well, to run out of fuel, he would need to require more than 25 liters of fuel. So if 25 liters of fuel is right over here, so this is 25 liters of fuel, the scenario where Shinji runs out of fuel is right over here. This is where he needs more than 25 liters. He actually has 25 liters in his tank. So how do we figure out that area right over there?