Изобразите на координатной прямой промежутки : а)x≤-2; б)0

а)   \\\\\\\\\\\\\\\\\\\\\\\\\\       -------------------[-2]-----------------→ []- сплошной кружок в точке х=-2 б) х > 0                             \\\\\\\\\\\\\\\\\\\\\\\\\\\\ --------------------(0)-------------------------------→ () пустой кружок x < 0 \\\\\\\\\\\\\\\\\\\\\\\\\\\                             --------------------(0)-------------------------------→ х  ≥0                             \\\\\\\\\\\\\\\\\\\\\\\\\\\\ --------------------[0]-------------------------------→ x ≤ 0 \\\\\\\\\\\\\\\\\\\\\\\\\\\                             --------------------[0]-------------------------------→