Two blocks connected by a string are pulled

Question

across a rough horizontal surface by a force
applied to one of the blocks, as shown.
The acceleration of gravity is 9.8 m/s
Block 1 has a mass of 5 kg while block two has a mass of 8 kg. A string is tied to the 8 kg block pulling up at and angle of 44 degrees with a force of F
µ = 0.17
If each block has an acceleration of 2.8 m/s
2
to the right, what is the magnitude of the
applied force?
Answer in units of N