Please help with the following questions, thanks.

1. What is the total resistance when the following resistors (150, 470, 680) are connected in: (4 marks) a) series b) parallel 2. If a pool pump requires 220 V to operate, draws a current of 8.5 A and runs for 5.0 hours a day, how much energy does the pool pump use in a day? [3 marks] 3. I have a radio transmitter where the antenna output is designed to hook to an antenna with a resistance of 402 (RT). However, my antenna has a resistance of 12 0. What size of resistor can I add in parallel with my antenna so my transmitter will work properly? [3 marks] 4. A step-down transformer has a primary voltage of 240 V. If the primary winding has 150 turns and the secondary winding has 15 turns, what is the SH secondary voltage? [3 marks] gas