Two questions for beginners from Statistics and Probability, send me a quick message, I'm waiting

. In a primary screening process of applications, the applicant must answer 4 questions correctly out of 14 questions and the exam is stopped once the required corrected answers reached. What is the probability that an applicant passes the exam after answering 6 question if the chance of answering each ' .question correctly is 0.84 I.Consider the following continuous cumulative density function , What is the ' ?P{0.5