You have a total of 12CP between your 3rd and 4th year to choose other subjects.
So according to the rules you need 192CP. 18CP which must be in MATH so you could 4x Junior math subjects (3CP each -MATH1001/1003/1004/1002/1005) to make up 12CP and one senior MATHSTAT subject. Now you have 174CP left to do.
According to the degree guide, you cores will make up 78CP (ENGG1805, INFO 1103, ELEC1601, INFO1105, COMP2129, INFO2120, ISYS2140, COMP2007, INFO2110, INFO3402, ISYS3401, INFO3600). So now you have 96CP left (66CP to meet the 144CP of core and selected cores req. I'm not sure if the MATH subjects count as selected cores, if they do then that should bring you down to 48CP/144CP)
You will also need make sure to complete 60CP (84-24CP from INFO3402/ISYS3401/INFO3600) worth of 3000-level or above subjects with your left over CP's so you have 30CP's left which should be filled up by your 1st/2nd year electives(6x2 1000-Level = 12CP, 6x2 2000-level=6CP, and 2 left for whatever you like)
I hope this helps you! I'm not an ENG students so maybe someone can clarify what are 'selected cores'.