Step 1 :

(a)

The logarithmic expression is $\"\"$ .

Apply quotient property of logarithm : $\"\"$ , where $\"\"$ .

$\"\"$

Apply product property of logarithm : $\"\"$ , where $\"\"$ .

$\"\"$

Apply quotient property of logarithm : $\"\"$ , where $\"\"$ .

$\"\"$

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

Step 2 :

(b)

The logarithmic expression is $\"\"$ .

Apply quotient property of logarithm : $\"\"$ , where $\"\"$ .

$\"\"$

Apply quotient property of logarithm : $\"\"$ , where $\"\"$ .

$\"\"$

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