5. 7. You have a toy car that needs a total EMF of 5 V and internal resistance of 1.0 to run and

are given four batteries:

a. EMF = 3 V, Ri =1.0 ;

b. EMF = 5 V, Ri =1.7 ;

c. EMF = 2 V, Ri =1.0 ;

d. EMF = 5 V, Ri =2.5 ;

Which two batteries would you pick and how would you connect them to achieve the required values to power the toy car?