Can someone quickly help me with my math homework on surface area/volume?

I've searched a lot on the internet but I can't find any video or anything that will help me. I haven't been here all day today and I have to finish this homework by tomorrow. I've already finished a) and I don't know if it's right but somehow b) and c) are very difficult for…

Surface area and lateral area of ​​an oblique pyramid and an oblique cone?

Hello everyone, I have a question. Does anyone know the formulas for the surface area and lateral area of ​​an oblique pyramid that has a square base and a three-sided base, or the formulas for the surface area and lateral area of ​​an oblique cone? That would really help me a lot, thank you.