Write codes to plot the function for $-5x30,$ where $y($use variable name: $y)=$

$15\sqrt[\phantom{2}]{4x}+10,$ when $x>9$;

$10x+10,$ when $0x9$;

$10,$ when

Create $x$ as a vector using step size $0\mathrm{.}1($use variable name: $x).$