I need two troubleshooting

$($ one high density$)$ I want ex on the problem low melt flow rate $($MFR$)$ and $($ one low density$)$ I want ex on the production line is experiencing gel formation in the final product, that hsppened at Polyethylene plant with $($case study with simple data appling by calculations$),$

solutions, discussion,

$$result and conclution. $($ please I need it as a mathmematical problem $).$ I appreciate your effort and$$copreation$.$