Please show all steps, thank you

Thinking and Inquiry [6 marks] 1. A 125.0 g bullet is red into a 5.95 kg sand bag suspended from the ceiling by a 2.8 m string. After the bullet imbeds itself into the bag, it swings up 0.45m. How fast was the bullet going before it hit the bag? \\ \\ \\ \\ 2.8m iv} $0.45m l)