Disjoint Sets

From the following pairs of set, identify the disjoint and overlapping sets.

$E=$ Set of months having $30$ days and $F=$ Set of months having $31$ days

From the following pairs of set, identify the disjoint and overlapping sets.

$P=$ Set of digits in the number $3150$ and $Q=$ Set of digits in the number $2468$

Let $E=\left\{\mathrm{letters} \mathrm{of} \mathrm{SON}\right\}, F=\left\{\mathrm{letters} \mathrm{of} \mathrm{MAMMAL}\right\}$, then $E$ and $F$ are disjoint sets.