Question: is this right? GF x : G(x) GF true : bool GF false : bool GIn : int Ghel : t1 G,x : t1 /

is this right?

GF x : G(x) GF true : bool GF false : bool GIn : int Ghel : t1 G,x : t1 / e2 : t2 G bel : bool GF e2 : bool GFlet r = el in e2 : 12 G Fel and e2 : bool Ghe : int G bel : bool GFe2: t Ghe3 : t GF eq0 e : bool GF if el then e2 else e3 : t What is the final type of the expression ego if true then 0 else 1 ? O int O bool O true O The expression is not well-typed

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