[填空题]
The number of phone calls per hotb2bjrza t87 m7mk+.2 oxsg e-ur /+vx l z87mm, qo1cewmthat store managers receive during the day are s8mlv,qz+ c7w meo1m x/hown below.
$\begin{array}{llllllll}3 & 5 & 6 & 2 & 4 & 7 & 4 & 9\end{array} $
1. Find the median number of calls.
2. Write down the value of
(1). the mode;
(2). the upper quartile.
3. Find the probability that managers received no more than 5 calls in a randomly chosen hour.
