Two workers undertake to do a job. The second worker started working 2 hours after the first. Five hours after the second worker has begun working there is still 9/20 of the work to be done. When the assignment is completed, it turns out that first worker has done 60% of the work, while second worker has done rest of the work. How many hours would take each one to do the whole job individually?
a. 10 hours and 12 hours
b. 15 hours and 10 hours
c. 20 hours and 25 hours
d. 18 hours and 20 hours
e. None of these