I have some questions about resonant circuits , I started this course in last week .. In the piture below I want to calculate resonance frequency

and Q factor , How to do that?

For question 1) I red the book

For question 2) What I know that W = 1/sqrt(C*L) , but according to the question I have to take into account R1 and R2 , How to do that and What formula I have to use??

Q factor is Q=Rp/W*L , but this does not fit , it feels that I have to use another formula?

For question 3) I do not understand it

For question 4) Q=W*L/Rs , it it correct?

For question 5) How to think here? the question is not clear

thanks