#1 - SAYC, 2S would be reverse and since responder bid 2/1, also a GF. 2C is not forcing by a passed hand.
#2 - agree with bruce. agree with Irdoz's point about reverses not forcing if responder passes. Passing responder's only obligation is choosing between opener's two suits and can pass if likes 2nd better. But MUST return to 1st if likes it better. MAIN PURPOSE of having a partner is to help pick best trump suit. No excuses.