Find DNF and CNF for the formulas

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Find DNF for the formula. (I've reserched some information. So do I must firstly to find PDNF, like (x ̅ ¯y ¯z ⋀ x ̅ ¯yz ⋀ x ̅yz ⋀ x¯y ¯z ⋀ xyz) or ..?) f (x, y,z) = (11011001)

Find CNF for the formula: $$((x|y)↓ \overline{z}))→(x+y\overline{z})$$