ck,
Sometimes cancer cells multiply very fast, never know when it start. Don't blame yourself, just try to make your mum comfortable. Hope your mum recover well, so far breast cancer survival or success rate is quite high compare to the other cancer.
QQ,
Needs lots of luck for balloting. If choose medium popular sch, then most pro will get in as within 1km.
For phase 2c, if left 100 places, 120 applied. If all 120 within 1km, then all need to ballot. If 100 within 1km and 20 out of 1km, then all the 1km get in the others out of 1km not chance. If 80 within 1km, and 40 1-2km, then 80 within 1km no need to ballot and only the 40 need to ballot for 20 seats left.
Tian is citizen easier, as citizen have 2 ballots places, PR only 1.