$2-$ In a broadcast network, if the distance between two stations is $300m,$ the speed of light is $3{10}^8$

$\frac{m}{s},$ and the frame transmission time is $10s$

$($a$)$ How long does it take for the first bit to reach the destination?

$($b$)$ How long does it take for the last bit to reach the destination after the first bit has arrived?