Points $P(4,2)$ and $Q(x,y)$ are on the graph of the function $f(x)=\sqrt[\phantom{2}]{x}.$

Complete the table with the appropriate values of the $y-$coordinate of $Q,$ the point $Q(x,y),$ and the slope of the secant line passing through points $P$ and $Q.($Round your answers to seven decimal places.$)$

$\backslash$table$[[x,y,Q(x,y),m_{sec}$