What is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.16?

(Missing figure is here: https://www.physicsforums.com/attachments/ch05-p070-jpg.149243/ )

Let's call  and  the masses of the two blocks. We can write Newton's second law for both blocks (sum of all forces acting on the block = ma). On block 1, we have two forces: the weight  pointing downwards and the tension of the string T poiting upwards. On block 2, we have the tension of the string going right and the friction  going left. Therefore




Summing the two equations, we find

and then using  we can find the acceleration:

Since the pully is a simple machine so the mechanical advantage is a 1