In the following sequence of numbers, create an expression whose value is 4 by inserting brackets, parentheses, and the symbols for addition, subtraction, and division.
2 5 1 4 1

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit