Image distance against object distance

A concave mirror has a focal length of $8\ \text{cm}$. You will make the program find the image for six object distances, pick out the distance that gives an image of the same size, and count the images that are larger than the object. Then it draws the image distance against the object distance.

Your tasks.

1. Inside the loop, work out v (the image distance) and m (the magnification) for the object distance d.
2. Find same, the object distance that gives $m = -1$.
3. Find larger, how many of the images are larger than the object.