Answer with good high level explanation please

A computer system contains a byte addressable memory system with $8$ separate

memory modules. Each memory module contains $134217728$ cells. Recall that a zero$-$

based numbering scheme is used for memory modules, cells and bytes.

a$)$ If the memory employs big endian storage order, high order interleaving and $32-$bit

memory cells, what is the $32-$bit memory address of cell $1048578$ within module $3?$

Express your answer in hex.

b$)$ Answer part a$)$ again assuming the only change is to use little$-$endian storage order

instead of big$-$endian storage order? Express your answer in hex.