Who among the following is the BO?

1. The President took leave on Tuesday. 2. Y is ranked higher than P but lower than the AM which means Y must be working as SM and P must be working as Clerk. 3. Z, who took leave on Friday, ranked higher than the one who is a SM in SBI. 4. At least two persons ranked between the one who took leave on Wednesday and the one who took leave on Monday but the one who took leave on Wednesday ranked higher than the one who took on Monday. Now, Z works as either GM or AM. So, we have two possibilities for Z. Case I: When Z works as GM: 5. There are two people ranked between Q and the one who took leave on Thursday where Q’s rank is higher than the one who took leave on Thursday. 6. S is not the AM. R who is ranked lower than S, took leave on Saturday. Now, in case I, Q must be the President which means R must be working as BO and S works as AM which invalids the case I as S is not the AM. Now, in case II Q either works as President or as GM but when Q works as GM we cannot fix R who took leave on Saturday, So, Q must be working as President and S works as GM. The final arrangement is as follows: