$($b$)$ ZYX Co has had dividends grow from K $2\mathrm{.}00$ per share to K $4\mathrm{.}00$ per share over the last $10$ years $($the K$4\mathrm{.}00$ per share dividend was paid yesterday$).$ This compounded annual growth rate in dividends is expected to continue well into the foreseeable future. If the current market price ZYX$\text{'}$s stock is K$18\mathrm{.}00$ per share, what rate of return do investors expect to receive from buying ZYX stock?

$(10$ marks$)$