18! 1-2! Please answer both!!:)

A battery with an emf of 12.2 V has a terminal voltage of 11.9 V when the current is 3.46 A. HINT (a) Calculate the battery's internal resistance r (in ohms). (b) Find the load resistance R (in ohms). Need Help? Read It Watch It Submit Answer [-/1 Points] DETAILS SERCP11 18.3.P.005. Two resistors, R, and R2, are connected in series. HINT (a) If R, = 2.02 0 and R, = 6.67 0, calculate the single resistance equivalent (in $2) to the series combination. (b) Repeat the calculation for a parallel combination of R, and R2. (Enter your answer in .)