5, we are now back to the Mercedes era.
Verstappen was in the slip stream of Bottas who was only slightly slower on the straights; Verstappen would have needed a straight longer than the lap length to get past.
Perez was unfortunate in that he was on mediums which were clearly not as fast as the softs in the early laps.
Alonso had a terrible qualifying but picked up 5 places on his team mate who has frequently had praise for his driving. He needs to get up to speed on qualifying.
The Ferraris need more top speed as well and need to handle their tyres better.
There are clearly four levels of car : the Mercedes, the Red Bulls, the midfield and then the bottom four.