[填空题]
The histogram below auv i.5hz6 - ehvcb)3zsh 2; pv:bmko9ncows the weights of 40 Honeydew Melons, each measured correcm9; 2kbon vp:ct to the nearest kg.
1. Write down the modal weight of the melons. kg
2. Find the median weight of the melons.
The lower quartile is 3 $\mathrm{~kg}$ . kg
3. Calculate
(1) the upper quartile; kg
(2) the interquartile range.
