Analyze Flipper Length

For all penguins in the little_penguins table, get the species, island, flipper length, maximal flipper length in the table, and the difference in individual flipper length from the maximum. 
Build a result table with the fields:
- species,
- island,
- flipper_length_mm,
- max_flipper_length_mm,
- diff_from_max_flipper_length_mm.

Solve the problem without window functions.