$4.$ A stock sells for $$6\mathrm{.}99$ on December $31,$ providing the seller with a $6\%$ annual return. What was the price of the stock at the beginning of the year?

$$6\mathrm{.}59$

$$1\mathrm{.}16$

$$7\mathrm{.}42$

$$5\mathrm{.}84$