Can you help me figure out this question. I am stuck. Thanks

Xi Exp (A) , i 2 1, independently 1 point possible (graded, results hidden) Findpl = Pr(X1 < s, Xl + X2 > s). Hint: First find the joint p.d.f. (Xl , x2) (easy, since they are independent), then find P1 as the integral of over the region corresponding to the desired event - that's all. Evaluate P1 assuming = 2.0 and s=3.O, and mark the choice closest to your answer: O O O C) O O O 0.015 0.020 0.025 0.030 0.035 0.040 0.045