For the system in Problem 12 and Figure P4.12, how large can be made without the system...

For the system in Problem 12 and Figure P4.12, how large can be made without the system starting into motion?

(reference problem 12)

Two blocks of mass are connected by a massless string that passes over a pulley as shown in Figure P4.12. The coefficient of static friction between and the table is (a) Will this system be in static equilibrium? Assume the pulley is frictionless. (b) Find the tension in the string.