# Write your MySQL query statement below
select s.product_id, s.year first_year, s.quantity, s.price from Sales s
where (s.product_id, s.year) in (
select s.product_id, min(s.year) from Sales s group by s.product_id
)
# Write your MySQL query statement below
select s.product_id, s.year first_year, s.quantity, s.price from Sales s
where (s.product_id, s.year) in (
select s.product_id, min(s.year) from Sales s group by s.product_id
)