We have discussed the characteristics of different casting methods $($e$.$g$.,$ sand casting, investment casting, and die casting$)$ and their corresponding pros and cons. Explain which casting method is the most suitable for each of the following parts. Namely,

List at least $2$ major pros for the selected process.

List at least one major con for each casting method not selected.

a$.$ Auto$-$transmission components made of aluminum.

b$.$ Pipe elbows$/$fittings made of malleable iron

c$.$ Generative design for light$-$weight drone frame made of aluminum

d$.$ Aluminum alloy wheels