can you prove this using laws of interference not truth tables please, thank you

Q 5. Determine whether the following arguments are valid: (a) p 9 S - q ..svo (b) p (q (p 9) r-> 9 .. (c) (p (q (p ^ q))) ::(-(p^q) (p -)) (d) It is necessary to know how to program, in order to do well in computer science. If you do well in computer science, you have a guaranteed job. Not everyone in this class knows how to program. Therefore not everyone in this class will have a guaranteed job