Write a function that will compute a 7-bit value suitable for displaying one hexadecimal digit (0 to f) on a seven-segment display. Each of the display's segments maps to one bit of the number, as indicated in the diagram below (1=on, 0=off). Because the display has 7 segments, only the lowest 7 bits are used. Set the upper bits to zero.
Your function will be passed one parameter: The number to be displayed (guaranteed to be 0 to 15). Return the appropriate bit pattern.
Expected solution length: Around 5 lines.
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