Disk Partition Error

Sep 26, 2018
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I was trying to dual boot my PC to work with Ubuntu along side with Windows but i faced some problems when i was making some space/room for Ubuntu for some reason my Disk Drive "F" is divided to 3 partitions (39 GB) then un-allocated area (98 GB) then 2 partitions of F that are not even merged (345.6 GB) and then (96 GB) so i need to know some answers:
1) why is it interrupted with un-allocated space? and how to fix?
2) why my disk does not merged in some areas where there is no interruption from un-allocated space? and how to fix this too?

Thanks in advance