I have a material science problem, I will thumbs up if solved quickly

Acylindrical bar of metal having a diameter of 19.4mm and a length of 207mm is deformed elastically in tension with a force of 47200N. Given that the elastic modulus and Poisson's ratio of the metal are 61.7GPa and 0.34, respectively, determine the following: (a) The amount by which this specimen will elongate in the direction of the applied stress. (b) The change in diameter of the specimen. Indicate an increase in diameter with a positive number and a decrease with a negative number. (a) mm (b) mm