Christa Pate owns unimproved land with a current market value of $175,000, 50 NLR convertible bonds with a current market value of $48,500, and 1,000 shares of MPT stock with a current market value of $72,500. Christa expects returns of 14%, 21%, and 9%, respectively, on her investments. What is the overall weighted-average expected return on Christa's portfolio?