An object is placed $20$ cm to the left of a negative lens with a focal length of $20$ cm $.$ A positive lens with focal length $10$ cm is located $10$ cm to the right of the negative lens.

a$)$ Draw a ray diagram for the first $($negative$)$ lens. Indicate the object position, the focal point on each side of the lens and the image position

$($b$)$ Draw a ray diagram for the second positive$)$ lens and follow the rest of the steps