Please answer step by step, applying estimate formulas, use of tables, as well as any assumptions needed to solve the pr

[answerhappygod]

Please answer step by step, applying estimate formulas, use of
tables, as well as any assumptions needed to solve the problems.
The previous answer you provided me was incomplete. I need
calculations and formulas.
A company dedicated to caring for
the elderly is considering offering a joint childcare service for
its employees. As part of the feasibility study for the project,
they want to calculate the average weekly cost of childcare. A
sample of 10 employees using this service reveals the following
amounts spent last week. 100, 107, 90, 97, 92, 105, 101, 91, 99,
104. Construct the 90% confidence interval of the population mean.
Interpret the result.