Free body diagram for 9th grade talent exam problem

[sidt36]

I have been preparing for a 9 Th grade talent exam and i can get my head around this problem

I keep getting the same answer 5, i used fbd

The answer is 7 ; help me out where am i wrong

 

[HomogenousCow]

The static friction between the lower block and the table is also affected by the weight of the top block.

 

[sidt36]

aah forgot bout that

 

[Chestermiller]

aah forgot bout that

You wouldn't have forgotten if you had drawn a free body diagram.