P is 4 times faster than Q in doing a job. Q takes 27 more days than P to finish the job. If they work together, in how many days will the work be finished?

A

$$6\frac{4}{5}$$

B

$$7\frac{4}{5}$$

C

$$7\frac{2}{5}$$

D

$$7\frac{3}{5}$$