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

Quiz for Verb: 'To String '

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

'String up' - Hang somebody

'String together' - Put words together into a coherent text

'String out' - Make something last as long as possible

'String along' - Deceive someone for a long time

'String along' - Accompany someone because you haven't got anything better to do