My dad worked in an office in a school. He started work at 8 o'clock and he finished at 3 o'clock. He didn't earn much money, but the people were very friendly and he liked the students. My dad used a computer at work for the first time in 1981. My dad's job was fun because it was busy.
So the answer is:
- a. Three capital letters
- b. Three full stops
- c. Two apostrophes