// I AM NOT DONE

        // TODO: Fill this up so that each element in the Vec `v` is
        // multiplied by 2.

        *i *= 2;

// I AM NOT DONE

    let v = // TODO: declare your vector here with the macro for vectors

    let v = a.to_vec(); // TODO: declare your vector here with the macro for vectors

// I AM NOT DONE

        if !basket.contains_key(&fruit) {
            basket.insert(fruit, 11);
        }

// I AM NOT DONE

    let mut basket = // TODO: declare your hash map here.

    let mut basket: HashMap<String, u32> = [(String::from("apple"), 1), (String::from("orange"), 2)]
    .iter().cloned().collect(); // TODO: declare your hash map here.