im very bad at probability idk how to learn it please send help

(1 point) The proportion of eligible voters in the next election who will vote for the incumbent is assumed to be 53,5%. What is the probability that in a random sample of 570 voters, less than 49.8% say they will vote for the incumbent? Probability (1 point) The time it takes for a statistics professor to mark a single midterm test is normally distributed with a mean of 5 minutes and a standard deviation of 2.5 minutes There are 65 students in the professor's class. What is the probability that he needs more than 5 hours to mark all of the midterm tests? Probability (3 points) An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 111 cm and a standard deviation of 5 cm. A. Find the probability that one selected subcomponent is longer than 113 cm Probability - 2.88 B. Find the probability that 4 subcomponents are randomly selected, their mean length exceeds 113 cm. Probability C. Find the probability that it 4 aro randomly selected, al 4 havo tangths that exceed 113 cm. Probability