please answer this and show your solutions. I will give you a very good feedback! Thank you in advance.

4. Three resistors, R. =5 ohms, R, = 8 ohms, and R = 10 ohms, are connected to a battery of voltage V = 4.5volts, see fig. 2. Calculate the a) equivalent resistance, b) the currents across the resistors and c) the voltage across each resistor. R1 R2 4.5V Fig. 2