$($a$)$ Find the break$-$even point for the cost and revenue functions $($Enter your answer as an ordered pair.$)$

$C(x)=186x+5,852$

$R(x)=224x.$

$(x,f(x))=$

$($b$)$ Find the value of $x$ so that profit $=16,800.($Round your answer to the nearest whole number.$)$

$x=$

$($c$)$ Find the value of $x$ so that loss $=8,000.($Round your answer to the nearest whole number.$)$

$x=$