On January 1, 2021, the Highlands Company began construction on a new manufacturing facility for its own use. The building was completed in 2022. The company borrowed $1,500,000 at 10% on January 1 to help finance the construction. In addition to the construction loan, Highlands had the following debt outstanding throughout 2021:

$7,000,000, 14% bonds
$2,000,000, 10% long-term note

What is the weighted-average rate of interest of all other debt?