Question 1094218
{{{ log(a,(x)) = 4 }}}
{{{ log(a, (y)) = 5 }}}
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The two properties of logarithms needed to do these are:
{{{ log((m*n)) = log((m)) + log((n)) }}}
and
{{{ log((m^k)) = k*log((m)) }}} 
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Since you are given {{{ log(a,(x)) }}} and {{{ log(a,(y)) }}} you should try to rearrange the given expression in terms of these so that you can plug in the numbers:

{{{ log(a, (x^2y)) = log(a,(x^2)) + log(a,(y)) = 2log(a,(x)) + log(a,(y)) = 2(4) + 5 = highlight(13) }}}
{{{ log(a, (axy))  = log(a,(a)) + log(a,(x)) + log(a,(y)) = 1 + 4 + 5 = highlight(10) }}}

I'll leave the 3rd one for you.  It is very similar (simpler) than the 2nd one above.

Hope this helps.