An 107-mm-focal-length lens is used to focus an image on the sensor of a camera. The maximum distance allowed between the lens and the sensor plane is 134 mm. A: How far in front of the sensor should the lens (assumed thin) be if the object to be photographed is 10.0 m away from the lens? Follow the sign conventions.

B: How far in front of the sensor should the lens (assumed thin) be if the object to be photographed is 3.0 m away from the lens? Follow the sign conventions.

C: How far in front of the sensor should the lens (assumed thin) be if the object to be photographed is 1.0 m away from the lens? Follow the sign conventions.

D: What is the closest object this lens could photograph sharply? Follow the sign conventions.

With i really need the correct answer!

An alligator swims to the left with a constant velocity of 5 \,\dfrac{\text{m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction. when the alligator sees a bird straight ahead, the alligator speeds up with a constant acceleration of 3 \,\dfrac{\text {m}}{\text s^2}3 s 2 m ? 3, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction leftward until it reaches a final velocity of 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction leftward. how many seconds does it take the alligator to speed up from 5 \,\dfrac{\text {m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction to 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction?

Which accurately compares concave and convex lenses?