4. David and Ted are walking a trail. Ted walks 3.1 kilometers farther than David. Part A Write an equation for the number of kilometers David walks, d, if Ted walks 5.4 kilometers. Part B Write an equation for the number of kilometers Ted walks, t, if David walks 4.9 kilometers. Part C Fill in the blanks to tell the distance David and Ted walk. If Ted walks 5.4 kilometers, then David walks kilometers. if David walks 4.9 kilometers, then Ted walks how many kilometers?​