Hi, I need help solving these physics problems,

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Question 8 1 pts What is the combined resistance, in Ohms, of R1, r1, and R5? \fQuestion 10 1 pts If those Voltages, E1, E2, and E3 were absent, and only the resistors (the r's and R's) remained, what would the equivalent resistance of the circuit be as current flows from a to e