Explain the difference between Big$-$O$,$ Big$-$Theta, and Big$-$Omega notations.

$$Big O has the upper bound.

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$0$f$($n$)$k$$g$($n$),$n$0,$ k$>0$

$$

Big Omega has the tight bound.

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$0$k$1$g$($n$)$f$($n$)$k$2$g$($n$),$n$0,$ k$1,$k$2>0$

$$

Big Theta has lowerest boud.

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$0$k$$g$($n$)$f$($n$),$n$0,$ k$>0$