## tuples
### Instructions
- Define a tuple structure to represent a `Student` .
- Each student is identified by an id number of type i32, his/her name and his/her last name as a string Print the content of the tuple to stdout
- Then define three **functions** to return the id, first name and last name.
### Notions
- [Defining a struct ](https://doc.rust-lang.org/stable/book/ch05-01-defining-structs.html )
- [The Tuple Type ](https://doc.rust-lang.org/stable/book/ch03-02-data-types.html?highlight=accessing%20a%20tuple#compound-types )
- [Tuples ](https://doc.rust-lang.org/rust-by-example/primitives/tuples.html )
- [Tuple Structs without Named Fields ](https://doc.rust-lang.org/stable/book/ch05-01-defining-structs.html?highlight=tuple#using-tuple-structs-without-named-fields-to-create-different-types )
- [Adding Useful Functionality with Derived Traits ](https://doc.rust-lang.org/stable/book/ch05-02-example-structs.html?highlight=debug%20deriv#adding-useful-functionality-with-derived-traits )
- [Chapter 7 ](https://doc.rust-lang.org/stable/book/ch07-03-paths-for-referring-to-an-item-in-the-module-tree.html )
### Expected Functions
```rust
pub fn id(student: & Student) -> i32 {
}
pub fn first_name(student: & Student) -> String {
}
pub fn last_name(student: & Student) -> String {
}
```
### Usage
Here is a program to test your functions
```rust
use tuples::*;
fn main() {
let student = Student(20, "Pedro".to_string(), "Domingos".to_string());
println!("Student: {:?}", student);
println!("Student first name: {}", first_name(&student));
println!("Student last name: {}", last_name(&student));
println!("Student Id: {}", id(&student));
}
```
And its output:
```console
$ cargo run
Student: Student(20, "Pedro", "Domingos")
Student first name: Pedro
Student last name: Domingos
Student Id: 20
$
```
