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1. Delete the D: and Q: partitions.
2. Use Partition Wizard to extend the C: partition to the left, to grab the free space left after deleting D: and Q:
3. Now you have a C: partition and the Win 10 recovery partition.
4. Use PW again and shrink the C: partition to the left, by about 40 GB.
5. Now you have C:, 40 GB unallocated, and the Win 10 recovery partition.
6. Now you can use that 40GB unallocated for the Linux.
...and you'll have only used 3 partitions, so you have an extra slot, for... whatever.