LED cube column/level resistors question - AFTER reading for a couple of hours

Course, 9 * 15mA = 135mA, which is more than that transistor is rated for.
May have Absolute Ic of 200mA, but the characteristics all end at 100mA, so you're on your own for 135mA. You can be pretty sure Ib will need to be more than 5mA tho.