Evaluate the piecewise function at the given values of the independent variable. f left parenthesis x right parenthesis equals A left bracket. 5 x plus 4 if x less than 0 2 x plus 6 if x greater than or equals 0 ​(a) f left parenthesis negative 2 right parenthesis ​(b) f left parenthesis 0 right parenthesis ​(c) f left parenthesis 2 right parenthesis