Which condition did penelope give the suitors to win her hand in marriage

Wha is the topic discussed in “lifeboat ethics” ?

1. saved aronnax from drowning "an incident" 2. speed of the nautilus man-of-war 3. next to captain nemo conseil 4. electricity vigo bay 5. "a coral tomb" 20,000 leagues 6. the nautilus runs aground nemo's "thunderbolt" 7. episodes are connected by aronnax's quarters 8. captain nemo's "bank" cause 9. distance aronnax traveled on the nautilus "a fine death for a sailor" 10. captain nemo sinks for revenge 50 miles per hour

In this excerpt from act 1 scene v of macbeth what does lady macbeth imply about macbeth