QP1: Did appellants Cyr Banguguilan and Miguel Bocardo forfeit their Fed. R. Evid. 403 challenge to the admission of photographs and video recordings depicting Steven Rodriguez's sexual abuse of a physically and mentally disabled eight-year-old girl when opposing admission pursuant to Fed. R. Evid. 403 but without specifically demanding that the district court review the proffered exhibits before ruling?; QP2: Whether a district court abuses its discretion by admitting graphic depictions of violent sexual abuse of a mentally and physically disabled 8-year-old girl without viewing the evidence to assess defendants' Rule 403 challenge?; QP3: Whether the court of appeals must review evidence challenged under Rule 403 before resolving that claim of error?