Minimizing Karnaugh map
Assuming that \$\Phi\$ is the same as X (don't care), I would make the following corrections:

JA = ¬B ¬C ¬D
Here you covered a 0 that you shouldn't, so you have to make a smaller minterm.

KA = D
Here you can make a bigger minterm because the 2*2 are above the minterm only contains don't cares.

KC = ¬D
Again, you can meg a bigger minterm. You don't have to add C because the first column only contains don't cares and ¬D covers the first and the last column.