Answer
Amplitude is 1
period is 4
Horizontal shift is $-\frac{1}{3}$
Work Step by Step
First, one must convert the equation to the following form $y=a\cdot $cos$(k(x-b))$, so it will be $y=- $cos$(\frac{\pi}{2}(x-(-\frac{1}{3})))$
Now one can find the data. The amplitude is $|a|$ which is 1 in this example. The period is found using $\frac{2\pi}{k}$, so $\frac{2\pi}{\pi/2}=4$. And the horizontal shift is represented by $b$, which, in this case, is $-\frac{1}{3}$.
