plz solve 1st and 3rd correctly asap.dont copy wrong answer from Chegg.

Q2) A gear box is to be designed to reduce the input speed of 4800rpmto30rpm. Available modules are 5mm,8mm and 10mm and available pressure angles are 20 and 25. The gear box should be as small in size as possible, without having the issue of interference, a) Clearly stating reasons, select appropriate module and pressure angle and design the gear box [7] b) Neatly sketch the drive [2] c) Find the contact ratio between the gears in the stage that has the largest reduction ratio [3] Z=(rp+ap)2(rpcos)2+(rg+ag)2(rgcos)2Csin Q2) A gear box is to be designed to reduce the input speed of 4800rpmto30rpm. Available modules are 5mm,8mm and 10mm and available pressure angles are 20 and 25. The gear box should be as small in size as possible, without having the issue of interference, a) Clearly stating reasons, select appropriate module and pressure angle and design the gear box [7] b) Neatly sketch the drive [2] c) Find the contact ratio between the gears in the stage that has the largest reduction ratio [3] Z=(rp+ap)2(rpcos)2+(rg+ag)2(rgcos)2Csin