3. Is going to be 7*12= 84 inches because the tree is drawn as 7 inches in the scale and for every inch in the scale, it is 12 inches in real life.
4. Is going to be similar since for every inch on the map the meter in real life is 30 so 2.5*30= 74 meters.
Hope I explained it enough that you understand the concept and not just gave you an answer.