Solve the all parts of following question given below:
Question: A candle with a flame 2.5cm tall is placed 4.3cm from the front of a concave mirror. A virtual image is formed 13cm behind the mirror.
Question I: Find the focal length of the mirror.
Question II: Find the radius of curvature of the mirror.
Question III: How tall is the image of the flame?
Please use as much detail as required in your answer. Thanks.