任务型阅读 根据短文内容，完成所给的任务。（5分）

Mr. White is a teacher in our school. He is from Canada. He came to China two years ago. He is kind and helpful. We all like him. His son, Rick, is my good friend. We are in the same class.

Today is June 25th. It is Rick’s fourteenth birthday. We plan to hold a party for him. Here is the program for his birthday party.

小题1:My classmate, Rick, comes from__________.

小题2:Rick’s father is a_________.

小题3:Rick was born on__________25th.

小题4: Maria will perform          _at the party.

小题5:__________will play the piano because she is good at it.

在倾角为θ的光滑斜面上端系有一劲度系数为k的轻质弹簧，弹簧下端连一个质量为m的小球，球被一垂直于斜面的挡板A挡住，此时弹簧没有形变，若挡板A以加速度a(a＜gsinθ)沿斜面向下匀加速运动，问：

(1)小球向下运动多少距离时速度最大？

(2)从开始运动到小球与挡板分离时所经历的时间为多少？

(3)从开始运动到小球与挡板分离时外力对小球做的总功为多少？