The NPV profiles show that the IRR and NPV criteria lead to the same accept/reject decision for any independent project. Consider Project L.
It intersects the X-axis at its IRR, 18.1%.
According to the IRR rule, L is acceptable if WACC is less than 18.1%. Also, at any WACC less than 18.1%, L’s NPV profile will be above the X-axis, so its NPV will be greater than $0.