MY LIFE IS DEPENDANT ON THIS QUESTION PLEASE HELP A *****?

A 12.4 V car battery with negligible internal resistance is connected to a series combination of a 3.4 resistor that obeys Ohm's law and a thermistor that does not obey Ohm's law but instead has a current-voltage relationship V=aI+BI^2 , with a=3.8 omega and B = 1.5 omega/A