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Can any help with a few electronic questions?

Sure. How far have you got on the first one?
If you start on the right hand side, R7 & R8 in series can be replaced by one equivalent resistor.
(as you work these out, keep the working. You may find it useful for a later question)
Then that one will be in parallel with R6, so the new one & R6 can be replaced by a single new resistor equivalent to all so far.
This new one is in series with R2 and also with R5, so ...
Until you have just one equivalent resistor across the battery, which is what 1a) asks.
.
Let us know how that part goes and see if you need more help.
 
This is not a free homework site. Please show us the work you have done so far to answer each question, and we will advise.

The answers to all three questions are in any introductory book about electricity and electronics, using the most basic aspects of resistors and capacitors. Does your course have a textbook?

ak
 
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