Can u help me with this ??

Put the verbs in brackets into the
to-infinitive or the -ing form. How do
the sentences differ in meaning ?
a) Don't forget ..................... (tell) Kristen about the beach party tonight.
b) I'll never forget .. ........ (go) to
Australia last summer.
a) Stop ..................... (play) that music! It's really annoying!
b) Let's stop ..................(buy)something to eat. I'm so hungry.
3 a) Try ... .......... (drink) some mint tea.It's good for your stomach.
b) Try ......... (be) here on time for the meeting.
4 a) I regret ........ ...... (invite) Angie to Luke's birthday party.
b) I regret ..................... (inform) you that your application was not successful.
5 a) Remember.............(lock) the door before you go.
b) I am sorry but I don't remember............ (meet) you at Mike's party.​