Answer Happy

please help, and if you could also explaun in the andwer why each reagent is used, it would really help with my comprehension!
Propose an efficient synthesis for the following transformation: The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A B t-BUOK E H₂, Lindlar's cat. 1 1) LIAIH: 2) H₂O' H₂, Pt F 1) 0:2) DMS J DMP or PCC C Na₂Cr₂O₂, H₂SO₂, H₂O G TsCl, py K Bra D MeONa H dilute H₂SO4 L 1) BH, THF: 2) H₂O₂, NaOH