Modify artwork for offset Print

I have two small jobs to edit existing artwork and prepare for offset printing A4: I need 2 simple changes to the Certificate artwork: Copy the red sticker so that it is on both sides, at about the same place on each side. Add two addresses to the bottom, with 2 addresses on each line: VIC Head Office: 1/20 Duerdin St, Clayton 3168 / NSW: Shop 1a, 8 Cowper St Parramatta 2150 WA: 6 Ruse St. Osborne Park WA 6017 / ACT: Shop A, Block 4, Farrer Shops, ACT 2607 The another small job to the Pads artwork: Edit the price of the 5" Qt. Roaster from RRP $880 to RRP $1,040 It is image bottom left hand side page one. Both f these jobs are A4 size I have ongoing work usually involving design as well as updates like these two.