7/8 x 5/6
1. not well-defined. people cannot distinguish if a person is truly happy or not.
2. not well-defined. some students find some subjects enjoyable while others do not.
3. not well-defined. people have different standards on how a teacher can be classified as "good".
4. well-defined. it is clear and easy to distinguish which numbers are even.
5. well-defined. it is clear and easy to classify which numbers are prime.
6. well-defined. it is clear and easy to get the factors of 24.
7. not well-defined. others may consider some people big while others do not.
in the eyes of a child a broken family is hard to get over because you have to pick witch parent you shall go with though you love them both very much