Single mirror system "Smartphysics" Solution

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https://www.lyft.com/drivers/WALID887565?utm_medium=d2di_iaem A spherical mirror forms an image of an arrow at x = x2 = -126.4 cm. The mirror is represented in the drawing as a plane at x = 0. The tip of the object arrow is located at (x,y) = (x1,y1) = (-152 cm, 3.51 cm).
1) What is f, the focal length of the mirror? If the mirror is concave f is positive. If the mirror is convex, f is negative.
cm
2) What is y2, the y co-ordinate of the image of the tip of the arrow?
cm
3) The object arrow is now moved such that image distance doubles, i.e., ximage,new = -252.8 cm. What is yimage,new, the new y co-ordinate of the image of the tip of the arrow?
cm
4) The object arrow is now moved to x = x1,new = -37.3 cm. What is y2,new, the new y co-ordinate of the image of the arrow?
cm
5)Which of the rays in the diagram is not reflected as shown?
(a)
(b)
(c)