Let S denote the set of all students in your class, C denotes the set of all countries, and I (x, y) denotes that x travels to country y. Express each of the following statements by a simple English sentence. Avoid symbols (e.g. x) and predicates (e.g. T(x,y)) in English sentences.
- Maryam travels to country y.
- There exist three students in the class who travel to Cyprus, and there exists a student who travels to Vietnam.
- For every country y, either Mona or Pete travels to that country.
- For every pair of students x and z, there exists a country y such that x and z do not travel to that country.
- There exists a student x and another student z such that for every country y, x travels to y if and only if z travels to y.
- For every pair of students x and z, there exists a country y such that x travels to y and z does not travel to y.