A leasehold investment has recently been sold for $$600,000.$ The lease has $5$ years to run without rent review. The tenant pays a contractual rent of $$60,000$ per annum. The full market rent at present is $$200,000$ per annum.

If the sinking fund rate is $3\%,$ estimate the leasehold yield.

a$)4\mathrm{.}4979\%$

b$)6\mathrm{.}4728\%$

c$)3\mathrm{.}8654\%$

d$)5\mathrm{.}4745\%$