Final answer:
Without specific details on part a) or 'x', it's unclear whether 'x' is bigger, smaller, or the same. However, general rules are provided indicating outcomes for multiplication and division, which could influence 'x'. Rounding explanations also suggest potential changes in 'x' based on digits used.
Step-by-step explanation:
From the student's question, it seems that the context is not entirely clear, and there appears to be missing information regarding part a) and the value of 'x'. However, based on the information provided on how digits and mathematical operations work, one can infer that the student is required to comment on the relative size of a number 'x' after performing a certain operation (possibly multiplication or division) as hinted by the provided reasoning.
Given that Hamza only uses odd digits and Grace only uses even digits to make two-digit numbers, the outcomes for either will be fundamentally different. Also, considering that the digit 0 is not used, this would limit the combinations they could create. The key rules to remember for operations are that the product of two positive numbers or two negative numbers is always positive, whereas the product of numbers with opposite signs is negative. Similarly, division follows the same rules regarding signs.
Another potentially relevant point is about rounding, as the examples given show an 8 rounding a 1 up to a 2, and a 5 rounding a 7 up to an 8. This may suggest that if 'x' is altered by operations that involve these digits, there may be effects on the rounding of 'x' and consequently its value.
Without the context of part a) or the specific value or operation involving 'x', it is impractical to definitively choose whether 'x' is bigger, smaller, or the same as the answer to part a). However, using the rules for multiplication signs, one might guess on the potential impact on an 'x' facing similar operations.