TotientRange

1. Copy the sequential TotientRange.c program available from www.macs.hw.ac.uk/ greg/courses/F21DP2/TotientRange.c
2. Review the source code, compile, and run it sequentially.
3. Adapt the program to be parallel using OpenMP
4. Evaluate the parallel performance as the number of cores ranges over 1, 2, 4, 6 and 8.