The interval notation of following inequality $-2x>0$ or $3x-4<11$ is $\left(-\infty ,k\right)$, then value of $k$ is

Solve $23x<100$ when $x$ is a natural number

Solve $23x<100$ when $x$ is an integer.

If the solution of $-2x\ge 9$, $x\in R$ is $(-\infty ,-k]$, then the value of $k$ is

Solve $-2x\ge 9$when $x$ is an integer.

Solve $-2x\ge 9$when $x$ is a natural number.

If solution of $\frac{3(x-2)}{5}\le \frac{5(2-x)}{3}$ is $x\in (-\infty ,k]$, then the value of $k$ is