I'm having a difficult time understanding the omhs law and when to use it.

(a) Draw a series circuit containing a cell, a switch, an ammeter, a voltmeter, and two resistors in series. The cell has a potential rise of 1.5 V. The voltmeter should be placed to measure the potential drop across one of the resistors. The resistors should each have a resistance of 12 Q. (b) What reading would you expect on the voltmeter? (c) What reading would you expect on the ammeter? (d) If the ammeter were placed at a different position in the circuit, how would its reading change? (e) If the voltmeter were placed across both of the resistors, how would its reading change? (f) : What is the total resistance of the circuit