Consider a sample with a mean of 50 and a standard deviation of 4. Use Chebyshev's theorem to determine the percentage of the data within each of the following ranges (to the nearest whole number)
- 40 to 60, at least %
- 35 to 65, at least %
- 42 to 58, at least %
- 36 to 64, at least %
- 32 to 68, at least %