In the twin paradox, we find that the Earthbound twin ages more than the twin traveling in the rocket. Could we consider the 'rocket' twin to be stationary and the "Earthbound twin to be traveling relative to the rocket twin? In this case, would the rocket twin age more?

An object 3cm high is place 20 cm from a concave mirror of radius 24cm. Find a) the focal length of mirror b) the image distance of object c) the nature of image

A concave mirror produces a virtual image that is 4 times as tall as the object. If the object is 44 cm in front of the mirror, what is the focal length of this mirror? (in units of cm)

Please answer sub (d) and (e) only in the image