I need help solving these problems. Please help me by answering and showing explanations.

Question 9 1 pts The time that it takes a randomly selected rat of a certain subspecies to find its way through a maze is a normally distributed random variable with mean 1.5 minutes and standard deviation as 0.35 min. Suppose five rats are selected. What is the probability that the total time for the five is between 6 and 8 minutes? O 0.821 O 0.712 O 0.647 O 0.243 Question 10 1 pts The amount of a particular impurity in a batch of a certain chemical product is a random variable with mean 4 grams and standard deviation 1.5 grams. If 50 batches are independently selected, what is the probability that the average amount of the impurity is between 3.5 and 3.8 grams? O 0.216 O 0.165 O 0.376 O 0.298