Please help ASAP

Dashboard Enter class code Go 5. The graph shows velocity versus time for a 5.0 kg sled pulled on a level surface by a constant horizontal force. What is the net horizontal force acting on the sled? 10 velocity (m/s) LA O 1 2 time (s) a a) 10 N b b) 15 N C C) 5.0 N d d) O.ON e e) 7.5 N