Find the amount each constant would carry if the total amount carried (5 cups) was redistributed equally among all the contestants. (The second photo doesn't need a answer but it's background information and the answer to it was 5)

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap