Which one of these is a wrong signature? 1 func getMinMax (a, b float64) (min, max float64) 2 func getMinMax (a float64, b float64) (min, max float64) 3 func getMinMax (a float64, b float64) (min float64, max float64) 4 func getMinMax(float64 a, float64 b) (float64 min, max) a) 2 b) 4 c) 3 d) 1