I need help calculating savings.

1.If I deposited $50 every month, starting at the age of 18, how much would I have when I reached the age of $65. The average return for this question is 7%.

2.If I deposited $50 every month, starting at the age of 18, how much would I have when I reached the age of $50. The average return for this question is 7%.

Please show your work, and help me learn what formula would be used for this.