Please help. I thought for the first one the 7 spaces read + - 1 0 0 0 1 because when there's only 1 space for the magnitude of the exponent it has to be 1.

For the second problem I put + + 1 9 9 9 9 because we want to have the largest exponent. Can you explain where I am wrong and what the 7 spaces would look like?

1.) For a hypothetical 7-bit decimal (base-10) computer which uses 1 bit for sign of exponent, 1 bit for magnitude of exponent, 1 bit for sign of mantissa and 4 bits for magnitude of mantissa, determine the smallest positive number that can be represented

10^-13

0

10^-10

0.000110^-9

^2.) For a hypothetical 7-bit decimal (base-10) computer which uses 1 bit for sign of exponent, 1 bit for magnitude of exponent, 1 bit for sign of mantissa and 4 bits for magnitude of mantissa, the magnitude of the largest number that can be represented is:

9999999

9999000

999900000

9999000000000

0.9999000