You partner with an Institutional LP that requires a cumulative waterfall structure. The institution invests $$980,$ and MP invests $$20.$

Tier $1$: IRR $0-7\%$ LP gets $100\%$ of cash flow

Tier $2$: IRR $7-10\%$ MP gets $10\%$ promotion, with balance split pari$-$passu

Tier $3$: IRR $10\%+$ MP gets $20\%$ promotion, with balance split pari$-$passu

What is the IRR for the MP for the given set of cash flows, Year $1$ $$70,$ Year $2$ $$80,$ Year $3$ $$90,$ Year $4$ $$1350?$ Expressed as a percentage rounded to the nearest hundredth decimal.