Regression and Statistical tests (see attached Google sheet)

Please just bullet point some things for 1, 3, 4, and 5. Thank you

1. Make a hypothesis of any variable with respect to amount spent. Please explain your null and alternate hypothesis.

2. Perform test of means around location of customer and amount spent.

3. Interpret your results and recommend actionable insights.

4. Regression outputof amount spent on relevant variables. In other words what factors influence amount spent by different customers.

5. Interpretation of coefficients of your regression output.

Please explain graph for question 2.

https://docs.google.com/spreadsheets/d/1CpOfskubvKHVw8XYJTKd-teHCyRtEiJVSXc_p08oNGc/edit?usp=sharing