question 1: I made a mistake in drawing a hypothetical path which I did it reversely
question 2: : I've completed the table but don't manage to finish my calculating to get the final answer.
question 3: I did not have any idea to solve it. Suddenly, my mind got blank.. End up didn't answer this question.
question 4: i cannot answer the question very well..i'm lost and blank.i lost many mark for these question.
i promise i will do well for the next test. 