Chapter 9.1, Problem 1E

t the ordered pairs in the relationRfrom $A=\{0,1,2,3,4)$to $B=\{0,1,2,3)$, where $\left(a,b\right)\in R$if and only if

a) $a=b$.

b) $a+b=4.$c) $a>b$.

d)ab.

e) gcd $(\text{a},b)=\text{1}$.

f) lcm

   $\left(\text{a},\text{b}\right)=\text{2}$.