Sentence 1: Nina wanted to do something special for all her friends. 
 Sentence 3: She had few funds, but she thought of a cheap  and creative idea 
 Sentence 4:  She assembled lots of sandwiches and snacks and threw a picnic 
 Sentence 5:  Everyone had a great lunch and made many sweet farewell memories! 
 Option 1: They were graduating and she wanted to show her love, memorably! 
 Option 2: She didn't have enough money since they were graduating.