Suppose you wanted to triple the reading on the ammeter. Choose one change from column a and column b that would combine to make this change. There is more than one combination that correctly answers the question, please answer with only one of the possible answers.

	a - First change		b - Second Change
1	Add one battery	1	Replace the resistor with a 28 resistor
2	Add two batteries	2	Replace the resistor with a 37 resistor
3	Add three batteries	3	Replace the resistor with a 93 resistor
4	Add four batteries	4	Replace the resistor with a 112 resistor
5	Add five batteries