An object A B is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm right of lens P. If the…

An object $\displaystyle A B$ is placed $\displaystyle 15$ cm on the left of a convex lens $\displaystyle P$ of focal length $\displaystyle 10$ cm. Another convex lens $\displaystyle Q$ is now placed $\displaystyle 15$ cm right of lens $\displaystyle P$. If the focal length of lens $\displaystyle Q$ is $\displaystyle 15$ cm , the final image is $\displaystyle \_\_\_\_$.