Is 'To Plow' Separable or Inseparable? - Phrasal Verb Quiz

Quiz for Verb: 'To plow'

Is the phrasal verb 'plow' separable or inseparable in the following examples?

'Plow into' - Collide into at speed

'Plow up' - Break the surface of soil

'Plow on' - Continue doing something you don't want to

'Plow through' - Read something that is difficult or takes a lot of time

'Plow through' - Eat a big meal

'Plow back' - Re-invest money you have made into a business

'Plow through' - Move through somewhere where there is little space or there are obstacles