$2)$ An object far far away is emitting light. Its light rays that are parallel to the principal axis incident a convex lens with focal length of $20$ cm $.$

b$)$ A convex mirror with focal length of $20$ cm is located $30$ cm away from the convex lens on the opposite side of the incident rays and shares the same principle axis.

Where is the image formed by the convex mirror?

c$)$ Is the image real or virtual as seen in the convex mirror in the above setup?