Would this be X = 5. HElp asap

Fast phone couldn’t copy and paste so i decided to right it down

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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