Bonjour
a- one person (familiar you => tu)
b- two persons (or polite vous)
c- two persons (or polite vous)
d- one person (familiar you => tu)
e- two persons (or polite vous)
f- one person (familiar you => tu)
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the two persons could also be the polite vous to one person only.
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hope this helps ☺☺☺