What is each franchise$$s IRR?

Expected Net Cash Flows for Franchise L for Year $0-$$$100,$ Year $1,$ $$10,$ Year $2,$ $$60,$ and Year $3$ $$80.$ Expected Net Cash Flows for Franchise S for Year $0-$$$100,$ Year $1,$ $$70,$ Year $2,$ $$50,$ and Year $3$ $$20.$ Show calculations.