Suppose we created a class in Swift called Point, with properties x and y$,$ and the usual initializer. Is there any way that we could follow the declaration

$$ let p $=$ Point$(1,2)$

with

$$ p$.$x $=5$

No$,$ because the declaration is wrong. The new operator is missing.

Yes, as long as the property x is computed, rather than stored.

No$,$ properties are private by default in Swift.

No$,$ let$-$constants make the instances they refer to immutable. We would have to change let to var to make the instance mutable.

Yes, the let only means we can't change what p is bound to$,$ but we may still be able to mutate the properties of the instance.