The displacement of an oscillating object as a function of time for two cycles of a function is shown below.
![1766_The displacement of an oscillating object.jpg](https://secure.tutorsglobe.com/CMSImages/1766_The%20displacement%20of%20an%20oscillating%20object.jpg)
a. What is the amplitude of the function?
b. What is the period of this function?
c. If this graph represents a cosine function, then write an equation for the function.