In a survey of $425$ students in a school, it was found that $115$ drink apple juice, $160$ drink orange juice and $80$ drink both apple as well as orange juice. How many drink neither apple juice nor orange juice?

If $A=\{1,2,3\}, B=\{4,5,6\}$. Check if the following is relation from $A$ to $B$. Also write its domain and range.

$R_1=\left\{\right(1,4),(1,5),(1,6\left)\right\}$.

If $A=\{1,2,3\}, B=\{4,5,6\}$. Check if the following is relation from $A$ to $B$. Also write its domain and range.

$R_2=\left\{\right(1,5),(2,4),(3,6\left)\right\}$

If $A=\{1,2,3\}, B=\{4,5,6\}$. Check if the following is relation from $A$ to $B$. Also write its domain and range.
$R_3=\left\{\right(1,4),(1,5),(3,6),(2,6),(3,4\left)\right\}$.

If $A=\{1,2,3\}, B=\{4,5,6\}$. Check if the following is relation from $A$ to $B$. Also write its domain and range.
$R_4=\left\{\right(4,2),(2,6),(5,1),(2,4\left)\right\}$

Determine the domain and range of the following relation.
$R=\left\{\left(a,b\right)/a\in N,a<5,b=4\right\}$