What will the console show when calling functions from the array

Determine what output will be displayed in the console when executing the following JavaScript code.

function makeBook() {
    let book = [];
    let i = 0;
    while (i < 10) {
        const page = function() {
            console.log(i);
        };
        i++;
        book.push(page);
    }
    return book;
}

let reader = makeBook();
reader[0](); // ?
reader[5](); // ?