HEY CAN YOU SOLVE THIS FOR ME USING EXCEL FUNCTIONS AND EXPLAIN HOW?

Consider this data with MARR = 10%.
			System A	System B
		Initial Cost	70000	122000
		Service Life yrs	5	11
		Annual Revenue	19000	19000
1. Why would AW (Annual Worth) be a convenient method here?
2. In order to use the AW approach there is something which must be planned for the future; what is it?
3. What is the AW of each for the given MARR?
4. Based on the result of 3) which is the better investment?
5. Determine if the IRR for System A is higher than 15%.