Please Help me solve ths problem in Excel with functions

Michael is considering his consumption habits in an attempt to try save more money. Breaking down his weekly expenses versus more frugal alternatives in Excel, Michael is astounded by how much frugality could save him. The savings can be seen in the attached Excel file.

$$ If Michael is $25$ and retires at $65,$ how much money would money would he save yearly by switching to regular coffee from a latte if he deposits his savings at the end for each week and the weekly value for the interest rate in his account would be $0\mathrm{.}1\%?$

ANSWER:

$$ How much would he saved by the time he was $65$ by just witching from lattes to regular coffee?

ANSWER:

$$ How much would he save by $65$ by making the following changes:

$$ Cutting out excess junk food:

$$ Lowering the price of his cable package:

$$ Quitting cigarettes:

$$ Reducing alcohol consumption:

$$ What would do the future value of changing all his spending to more frugal options be at age $65$

ANSWER:

$$ How much more would he have saved if he chose to retire at $70$ instead of $65?$

ANSWER: