Answer:
Dear Katie,
Me and my Family are going to a picnic on Saturday and we would like to invite you, the picnic will be at the park, you can bring any lunch that you would like if you don't like what we may be eating, or if you have any allergies to certain foods, we'd love to see you there!
From, ___________
Explanation:
I wrote a 60 word Email, you can cut some out for a shorter one if you would like, just enter ur name below where it says "From,____" and you should get 100%! If you have any questions you can always ask me. It was fun writing it for you! Have a nice day!!