Urgent Help needed for statistics Questions

Could somebody solve these two questions for me please?

Question: The payouts for the Powerball lottery and their corresponding odds and probabilities of occurrence are shown below. The price of a ticket is $1.00.
Divisions Payout Odds Probability
Five plus Powerball $50,045,000 146,107,960 .000000006799
Match 5 201,000 3,563,629 .000000280762
Four plus Powerball 18,000 584,454 .000001721788
Match 4 180 14,210 .000070511820
Three plus Powerball 180 11,924 .000083406884
Match 3 9 288 .003474157534
Two plus Powerball 9 720 .001324582574
One plus Powerball 3 113 .007831900000
Zero plus Powerball 2 64 .014415314286
Find the mean and standard deviation of the payout.

Question:Croissant Bakery Inc. offers special decorated cakes for birthdays, weddings, and other occasions. It also has regular cakes available in its bakery. The following table gives the total number of cakes sold per day and the corresponding probability.

Number of cakes sold in a day
12
13
14
15

Probability
.25
.40
.25
.10

Find the Mean number of cakes sold per day

The variance number of cakes sold per day

The standard deviation cakes sold per day

I would really bey verrryy obliged to you!