[填空题]
The graphs of displacement, veg wsoob9+89c;mk ,qcfj*wijxn,v fic4 4.h;olocitt5pn7c w(m9c ty and acceleration of a roller coaster in a the c7w5cm pn(t9tme park are shown in the following diagram.
1. Complete the following table by noting which graph A, B or C corresponds to each function.
When function is displacesment ;the graph is
When function is acceleration ;the graph is .
2. Write down the value of t when the velocity is greatest.
t= .