Hello, I got this question correct, but I am still confused as to how I did. Could I get an explanation? Thank you!

1/1 Question 1 Three blocks are connected by strings and pulled to the right by a force with magnitude Fo, as shown in the figure below. All frictional forces are negligible. The tension in the right and left strings have magnitudes T, and T2, respectively. Taking the positive direction to be toward the right, which of the following is a correct equation of motion for the block of mass ma? T2 H Fo m 3 m2 a. T1 = mza b. T1 + Fo-T2=mza V c. T1 - T2 = ma d. T1+T2 = ma