First of all, $63,833 for 5 persons is for the year 2013 (not 2014). You have to wait till CIC updates this form and the MNI table.
Q8) You will put MNI for 5 persons from the year 2014 when CIC updates the table
Q9) I don't understand you here. There are 3 separate boxes for 3 recent taxation years. When CIC updates the form, you will see 2014, 2013 and 2012. You will need to put your actual income from your NOA's for the respective years. And these incomes will have to be over the MNI level.
In your case,
For 2012, your income (+ cosigner's income if applicable) has to be over $62,023
For 2013, your income (+ cosigner's income if applicable) has to be over $63,833
For 2014, your income (+ cosigner's income if applicable) has to be over $63,833, perhaps over $65,500 (you have to wait till MNI table is updated)
FYI, if you look at the bottom left of each page of this IMM5768 form, you will see 11-2014 printed which means the form was last updated in November, 2014.