Hanson Company $($see BE$9\mathrm{.}4)$ borrowed $$1,000,000$ on March $1$ on a $5-$year, $12\%$ note to help finance construction of the building. In addition, the company had outstanding all year a $10\%,5-$year, $$2,000,000$ note payable and an $11\%,4-$year, $$3,500,000$ note payable. Compute the weighted$-$average interest rate used for interest capitalization purposes.