How many blocks of main memory are there?

Suppose a computer using fully associative cache has 224 bytes of byte-addressable main memory and a cache of 128 blocks, where each block contains 64 bytes. a) How many blocks of main memory are there? b) What is the format of a memory address as seen by cache; that is, what are the sizes of the tag and offset fields? c) To which cache block will the memory address 0x01D872 map?