Robust tightening torque interval

The bolt nominal diameter is $12\,\mathrm{mm}$ and permitted preload is $15$ to $24\,\mathrm{kN}$. Find the full wrench-torque interval that guarantees the permitted preload for every nut factor in $0.16\le K\le0.24$. Use $T=KF_i d$ and assume the applied torque is exact.