Help Zach Repair His Grandfather's Bike

So,we were celebrating my 41 birthday ride to Teleco to ride the skyway. We pulled off at the first pull off at the very start of the skyway and everybody had decided they didn’t wanna ride because the weather was cold conditions just wasn’t ideal for people that really hadn’t ever rode it before. Zach had said well I want to full experience. I want to go with you. so he started on the journey and about midway through he went into a curve and realized he was in too fast when he hit his brakes the back tire locked up, and it threw them into the guard rail! he was borrowing his bike from his grandfather it’s his main source of transportation, so I’m putting this together to try to order the parts to fix the bike. I would really appreciate your help. Thanks