Answer:
Left black
[tex] x < 13[/tex]
Right black
[tex]x \geqslant 7[/tex]
Blue
[tex]x \leqslant 1[/tex]
Red
[tex]x > 2[/tex]
Step-by-step explanation:
NOTES:
bold arrow means (less than or equal to OR more than or equal to
[tex] \leqslant \: or \: \geqslant [/tex]
thin arrow mean (less than OR more than)
[tex] < \: or \: > [/tex]
AND you can also put any alphabet to represent unknown
thats it hope this helps :)