Physics! Please help!?

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Two boxes connected by a light horizontal rope are on a horizontal surface, as shown in the following figure. The coefficient of kinetic friction between each box and the surface is 0.30. One box (box B) has mass 4.76kg , and the other box (box A) has mass m . A force F with magnitude 40.1N and direction 53.1∘ above the horizontal is applied to the 4.76kg box, and both boxes move to the right with 1.50m/s2.


A.)What is the tension T in the rope that connects the boxes?
Express your answer to two significant figures and include the appropriate units.


B.)What is the mass m of the second box?
Express your answer to two significant figures and include the appropriate units.