1. Who was Karl Lindner, and why did he visit the Youngers' house?
He was from Clybourne Park Improvement Association. He was calling to ask the Youngers not to move into their white neighborhood. The association members were willing to pay the Youngers not to move in.
2. What was Walter's reaction to Lindner?
He told him to get out of their apartment.
3. What presents did Mama get?
She got gardening tools and a hat.
4. What news did Bobo bring to Walter?
He tells Walter that Willy took all of the money and left without a trace.