Ten rugby balls are randomly selected from the production line to see if their shape is correct. over time, the company has found that 85.2% of all their rugby balls have the correct shape. if exactly 7 of the 10 have the right shape, should the company stop the production line?

1. yes, as the probability of seven having the correct shape is not unusual
2. no, as the probability of seven having the correct shape is unusual
3. no, as the probability of seven having the correct shape is not unusual
4. yes, as the probability of seven having the correct shape is unusual