A school bell rings every 42 minutes while a warning siren sounds every 56 minutes. Both were heard together at 8:00 a.m.
a. (i) At what time will they ring together again for the first time?
b. (ii) How many times will the bell ring between 8:00 a.m. and 2:00 p.m. (including the ring at 8:00 a.m.)?