7) Elizabeth is saving for her wedding in 4 years. She wants to be able to spend $25 000 on it. How much must she invest now at 5.8% compounded semi-annually? (3 marks). 8) Haroon borrowed $600 from a friend to buy a bike. If his friend charges him 8% compounded quarterly, how much interest is Haroon charged after 2 years? (4 marks). 9) Carlos' grandparents want to give him $10 000 on his 21 birthday. If Carlos is 10 years old right now, how much must they invest at 7.5% compounded semi-annually