A laboratory with two bricks (total mass is 6 kilogram) is held at rest on frictionless horizontal table. A 1 kilogram mass hangs vertically over the edge of the table and is attached to the cart by means of two light frictionless pulleys and two mass less inextensible strings. When the system is released, compute the magnitude of
a) the tensions T1 and T2
b) the acceleration of the laboratory cart
c) the acceleration of the vertically hung mass.