If log3(x)=a\log_3(x) = alog3(x)=a and log3(y)=b\log_3(y) = blog3(y)=b, which expression represents log3(x3y4)\log_3(\sqrt[4]{x^3 y})log3(4x3y)?
\frac{3}{4}a + \frac{1}{4}b
\frac{3a + b}{4}
3a + b
\frac{a + b}{12}