Series of Questions

Hi, first of all apologies for the number of questions below but any help would be appreciated for the answers:

1) Which of the below statements is correct regarding criminal offence?
– guilt may be decided by a jury?
– if he is found liable a prison sentence may follow?

2) Which are the below statements is correct regarding court approval for share reduction?
– reducing liability on partly paid shares in public companies require court approval
– creditor must always be invite to state objections

3) Which two of the below statements are correct?
– Obiter dicta statement may be of persuasive authority
– Decisions are always binding on lower courts
– Ratio decidendi of case sets the precedent
– For precedent to be binding, decision must be based on fact

4) Acceptance of offer:
– Does contract exist after offer has been accepted?
– Can acceptance be informed from conduct of parties?

Thanks