Lem turned to Madelyn and asked, "Hey, Madelyn, I'm stuck on a problem here. Can you give me a hand?"

Madelyn glanced at him and shook her head. "I'm stuck too. Why don't you ask Kennedy? He's ranked first in the whole grade."

Lem put on a pitiful expression. "He won't help me."

"But I'm not sure how to solve it either!" Madelyn then turned to Kennedy, inquiring, "Kennedy, have you figured out this problem? Could you teach us?"

Kennedy retrieved a workbook from his backpack. "Take a look at