In the circuit (Fig. ) the current is to be measured. What is the value of the current if the ammeter shown
(i) is a galvanometer with a resistance RG = 60.00 Ω;
(ii) is a galvanometer described in (a) but converted to an ammeter by a shunt resistance r
s = 0.02 Ω;
(iii) is an ideal ammeter with zero resistance?