$2\mathrm{.}5[5]<2\mathrm{.}3>$ Show how the value $0$xabcdef$12$ would be arranged in memory of a little$-$endian and a big$-$endian machine. Assume the data are stored starting at address $0$ and that the word size is $4$ bytes.

$2\mathrm{.}6[5]<2\mathrm{.}4>$ Translate $0$xabcdef$12$ into decimal.

$2\mathrm{.}16[5]<2\mathrm{.}5>$ Assume that we would like to expand the MIPS register file to $128$ registers and expand the instruction set to contain four times as many instructions.$$

$2\mathrm{.}16\mathrm{.}1[5]<2\mathrm{.}5>$ How would this affect the size of each of the bit fields in the R$-$type instructions?

$2\mathrm{.}16\mathrm{.}2[5]<2\mathrm{.}5>$ How would this affect the size of each of the bit fields in the I$-$type instructions?