Please help, I have absoluetly no clue how to solve this proof.

Provide complete citations for each line, including the premises (for which the citation is "Pr") and any CP or IP assumptions (for which the citation is either "Assp. (C.P.)" or "Assp. (I.P.)") Line numbers within a citation may be listed in any order: e.g., if the correct citation for a line is "MP 6, 4", the citation "MP 4, 6" will also be accepted. Provide citations in a separate column to the right, not immediately next to each sentence. . Clearly indicate sub-proofs by indenting (neatly and unambiguously) and drawing an initial arrow on the assumption line, a vertical line to the left of the entire sub-proof, and a horizontal line below the last line of the sub-proof. Do not indent lines that are not part of a sub-proof. Do not combine two steps into a single line, except for DN used with another rule (the citation must include both rules: e.g., "DN, MT 3, 6") or two applications of a single replacement rule to the same line (the citation must indicate that the rule was used twice: e.g., "Comm (x2), 9") Prove the validity of each of the arguments in questions 1-4, using the natural deduction system introduced in Units 7-9 [7 points]