A positively charged rod is brought near two uncharged conducting spheres of the same size that are initially touching each other (diagram a). The spheres are moved apart and then the charged rod is removed (diagram b).
(a) What is the sign of the net charge on sphere 1 in diagram b?
(b) In comparison with the charge on sphere 1, how much and what sign of charge is on sphere 2?

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(b) (a) XXXX