Both liaisons are optional in your examples.
Rationale
As regards verbs, liaisons are mandatory in the sole following case:
Entre le pronom personnel (ainsi que "on", "en" et "y") et son verbe, ainsi que l'inverse : nous avons, elles aiment, on ouvre, ont-ils, prends-en, allons-y.
As well as in "c'est̲-̲à̲-dire".
References
- https://fr.wikipedia.org/wiki/Liaison_en_fran%C3%A7ais#Liaison_obligatoire
- My experience as a native speaker.
- Laure's answer