How to implement the Add trait for a reference to a struct in Rust?

Hello! I'm learning Rust and trying to overload the `+` operator for my struct. I have a `Point` struct with two fields `x` and `y`. I want to be able to add two `Point` instances by passing them by reference, so as not to move ownership. Here's my code: ```rust struct Point { x: i32, y: i32, } impl std::ops::Add for Point { type Output = Point; fn add(self, other: Point) -> Point { Point { x: self.x + other.x, y: self.y + other.y } } } ``` This works, but it consumes `self` and `other` by value. I want to be able to write: ```rust let a = Point { x: 1, y: 2 }; let b = Point { x: 3, y: 4 }; let c = &a + &b; ``` I tried writing this: ```rust impl std::ops::Add for &Point { type Output = Point;