Can someone please help me with this problem?

Problem 1) Suppose weekly income for students at KSU follows a Normal distribution with a mean of $225 and a standard deviation of $40.

1. Suppose one student is randomly selected. What is the probability that this student's weekly income exceeds $310?
2. According to the Empirical Rule, approximately 68% of students have weekly incomes between what two values?
3. According to the Empirical Rule, approximately ____% of students have weekly incomes between $145 and $305?
4. Suppose a student is randomly selected and his weekly income is $400. Would this be considered an outlier? Briefly support your answer.

Problem 2)Consider the discrete probability distribution shown below. The variable X represents the number of loads of laundry you do per week. Use the given distribution to answer the questions that follow.

x	0	1	2	3	4	5
P(X = x)	0.16	0.25	0.34	0.15		0.03

1. What value for P(X = 4) makes this a valid probability distribution?
2. What is the mean of this distribution? In other words, how many loads of laundry do you do per week, on average?
3. Suppose a week is randomly selected. What is the probability that you do one or three loads of laundry this week?
4. Suppose a week is randomly selected. What is the probability that you do fewer than three loads of laundry this week?