Shawn earns $16000 per month. he spent 1/4 of his income on food; 3/10 of the remainder on house rent and 5/21 of the remainder on the education of children. how much money is still left with him

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