Two sticks

Two sticks, each of mass m and length l, are connected by a hinge at their
top ends. They each make an angle theta with the vertical. A massless string
connects the bottom of the left stick to the right stick, perpendicularly, as
shown in Fig. The whole setup stands on a frictionless table.

(a) What is the tension in the string?
(b) What force does the left stick exert on the right stick at the hinge? Hint:
No messy calculations required!