30 typists working 7 hours per day can complete a typing job in 15 days. ____ typists working _____ hours per day can complete (2/3)rd part of the work in 12 days. The values given in which of the following options will fill the blanks in the same order in which it is given to make the statement true:
I. 35, 6
II. 42, 5
III. 28, 9