twelfth night: Act 1 Scene 4

what name does viola take as a boy cesario
what does orsino think of cesario? likes her, talks privately w him, tells him he knows all his secrets
what does orsino want cesario to do talk to olvia for him-tells her to be rude, do whatever it takes to talk to her
why does orsino think olivia will see cesario? he is a eunuch (looks feminine)
what does viola say during her aside that she likes duke Orsino