Two masses of 4 kg and 5 kg are connected by a string passing through a frictionless pulley and are kept on a frictionless table as shown in the figure. The acceleration of 5 kg mass is

(1) 49 m/s2

(2) 5.44 m/s2

(3) 19.5 m/s2

(4) 2.72 m/s2

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