Can anyone help me with this exercise (man in shadow)

[GeorgeMarian]

Hi, I don't know how to solve this exercise..

Q. A man 2 m tall walks along the edge of a straight road 10 m wide. On the other edge of the street stands a streetlight 8 m high. If the man walks at 3/2 m/sec, how fast is his shadow lengthening when he is 10 m from the point directly opposite the light?

Thanks

 

[stapel]

Q. A man 2 m tall walks along the edge of a straight road 10 m wide. On the other edge of the street stands a streetlight 8 m high. If the man walks at 3/2 m/sec, how fast is his shadow lengthening when he is 10 m from the point directly opposite the light?

What have you done with the set-up they gave you in the image? Please be complete. Thank you!