Please help me solve these two questions with steps

(c) (3 points) Given that log(a) = 2 and log(b) = 4, determine log ( as ). .0 = 3 is ayounisnon ei nolfonut aniwollol ords son 4. (8 points) (a) (2 points) Write down a system of linear equations that describes the following situation: . Six times ac minus fourteen times y is equal to -7 . Negative two times y plus twelve times ac is equal to 0