A cereal bar is made from many ingredients including oats and chocolate.  One unit of each ingredient provides units of protein and fat as shown in the table below, while the other ingredients have insignificant amounts of protein and fat.  Is it possible to make a cereal bar that contains 7 units of protein and only 3 units of fat?  If so, how many units of each ingredient should be used to make the cereal bar?  If not, give an example of a cereal bar that is possible to make that has more units of protein than units of fat.