Exercise 1: Converting 202 to Binary and Hex — Possible Solution
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STEP 1: CONVERT 202 TO BINARY
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202 in 8-bit binary: 11001010

STEP 2: SPLIT INTO 4-BIT NIBBLES
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First nibble: 1100
Second nibble: 1010

STEP 3: CONVERT EACH NIBBLE TO A HEX DIGIT
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1100 (binary) = 12 (decimal) = C (hex)
1010 (binary) = 10 (decimal) = A (hex)

RESULT: 0xCA

STEP 4: CONFIRM 0xCA EQUALS 202
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0xCA = 12*16 + 10 = 192 + 10 = 202. Confirmed.

WHY THIS WORKS AS AN ANSWER
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Each nibble is converted individually to its own hex digit rather
than converting the whole number through decimal as an intermediate
step, matching this chapter's own stated reason hex works this way
(exact 4-bit alignment), and the result is independently checked
against the original decimal value.