advice

https://preview.redd.it/kcfcu8rmeo2e1.png?width=1884&format=png&auto=webp&s=dcebae3357369382c1a9966a58130ca0f48c3c14

https://preview.redd.it/gmub9armeo2e1.png?width=1966&format=png&auto=webp&s=ad9076cde9919a42a0a0e171448e0fb3d5cc519c

https://preview.redd.it/rpop89rmeo2e1.png?width=1958&format=png&auto=webp&s=5342f88aade7934ae1647f6195ca2efef801247c

https://preview.redd.it/1s6w0brmeo2e1.png?width=1984&format=png&auto=webp&s=caf21070fdafed7b73663b369474a3dbee623e34

I need to repair the crack on the top of the tailgate. Should I just sand and weld? any thoughts on welding a strip across the back of the tailgate for strength?