It is important that we understand how mortgage works. Using the following notations: 4: the loan (principal) outstanding att C: the periodical mortgage coupon payment 1: the interest paid att Lpaid the principal paid att Which of the following equations correctly describe the mortgage mechanics? i) 4 paid = C+1 ii) Lpaid = C- ii) 4+1 = 4 -paid iv) 4+1 = 4 + 4 paid i and iii Oi and iv Oil and iii Oil and iv