When $a = \log _ { 2 } 10 , b = 2 \sqrt { 2 }$, what is the value of $a \log b$? [3 points]\\ (1) 1\\ (2) $\frac { 3 } { 2 }$\\ (3) 2\\ (4) $\frac { 5 } { 2 }$\\ (5) 3