1.5: 4-bit Unsigned Integers as Hex Numbers
\(\begin{array}{ccc}\text { Decimal } & \text { Binary } & \text { Hex } \\ 1 & 0001 & 1 \\ 2 & 0010 & 2 \\ 3 & 0011 & 3 \\ \vdots & \vdots & \vdots \\ 10 & 1010 & \text { a } \\ \vdots & \vdots & \vdots \\ 15 & 1111 & \text { f }\end{array}\)