Let $a_n=\frac{4}{2n-1}$ for $n=1,2,3,$dots.

$(a)$ Write the first three terms $of{b}_n=a_{n+1}.$

$(Express$ numbers $in$ exact form. Use symbolic notation and fractions where needed.$)$

$b_1=$

$b_2=$

$b_3$

$(b)$ Write the first three terms $of{c}_n=a_{n+3}.$

$(Express$ numbers $in$ exact form. Use symbolic notation and fractions where needed.$)$

$c_2=$