How do I do all questions on this sheet

Ill upvote!

1. Determine the point groups of the following molecules 1. C2H4 (eclipsed) It. C2H4 (staggered) II. CH4 N. Pfi (trigonal biprramidel) V. Hg33+ V. [PiCld]' (planar) vi. C2He(cyclopropane) 2. Determine the number of infrared and Raman active carbonyl bands for [cis-1, MicO)] complexes 3. Determine the number and symmetry species of the fumarate ion: Hence calculate the number of infrared and Raman active bands for this ion. 4. Determine the number of infrared and Ranan active bands for BF 5. Calculate the number of terminal 8H bond vibrations which are infrared and Raman active in berane (B2+H)