The voltage and current produced by a 9V battery for different loads were measured as follows:
Voltage [V] 8.91 8.72 8.30 7.91 7.49
Current [mA] 89.4 171 377 549 750
(a) Determine the Thevenin equivalent circuit of the battery.
(b) What is maximum power that the battery can deliver? Which load draws this power?