Step 1:

The polar equation is $\"\"$ .

The maximum value of $\"\"$ for a polar equation $\"\"$ is

$\"\"$ .

The maximum value of $\"\"$ for a polar equation $\"\"$ is

$\"\"$ .

Step 2:

The zeros of $\"\"$ for a polar equation $\"\"$ is

$\"\"$ .

The zeros of $\"\"$ for a polar equation $\"\"$ is $\"\"$ .

Solution :

The maximum value of $\"\"$ is $\"\"$ .

The zeros of $\"\"$ is $\"\"$ .