[填空题]
The diagram below shows a stt7pm(jzi lx4 ;1xj7nk raight line of+q3a h./cnd$L_1$ which passes through A(0,−2) and B(8,0).
1.Write down the coordinates of the midpoint of line segment [AB]. (a,b) a= b=
Another line, $L_2$ , intersects the $y$-axis at C(0,3) and is parallel to $L_1$.
2.Find the gradient of $L_2$. $L_2$ =
3.Find the equation of $L_2$, giving your answer in the form y=mx+c. m = c =