Can you please help solve the below 3 questions?

My answers are :
Q1: B
Q2 : E
Q3: A and B
I’m not sure about the real answers, are mine wrong?
Hi, can you share your approaches for the three problems? We usually like to see what the student has attempted so that we can help fix any mistakes in their approaches and guide you to the right path.
Hi Leaderboard, I wasn’t sure how to approach Q1 and Q2 during my mock test and still am unsure about it to be honest.
For Q3 I chose numbers…
Case 1: X = 5, Y = 3, Z = 3 which proved 2x = 3y
Case 2: X = 6, Y = 4, Z = 4 which proved 4x = 6z
Case 3: X = 10, Y = 6, Z = 5…all 3 cases proved 5y > 9z can’t be true
In the test I had very little time for this Q so I got it wrong but upon reviewing the results I figured. Just wanted to know if there was another approach.
Clearly, we would rather not have to find the difference for all 13 days. Is there a shortcut?
Correct.
Thank you so much for your help.
So both the approach and answers derived for 1 and 2 are good?
Looks good to me.
Thank you for all the help
Change in windspeed should use absolute values.