Determine Whether the Following Symbolized Argument Is Valid or Invalid

question 104

Essay

Determine whether the following symbolized argument is valid or invalid. If invalid, provide a counterexample; if valid, construct a deduction.
P v (Q & K)
(P v Q) → [(L → ~X) & (~X → L)]
(L → ~X) → (X & ~Y)
(Y → Z) & (Z → M)
(Q → K) → Z/∴ Z

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Definitions:

Long-Term Debt

A financial obligation that is due for repayment in more than one year's time.

Ten-Year Treasury Note

A government debt security issued by the U.S. Treasury with a ten-year maturity, which pays interest to the holder every six months.

Cash Equivalent

Short-term, highly liquid investments that are easily convertible to known amounts of cash and close to their maturity.

Certificate of Deposit

A time deposit at a bank or financial institution that offers a fixed interest rate over a specified period.