Find the mode and median of a frequency distribution when Mean = 40, Variance = 625 and Pearsonian's Coefficient of Skewness (Sₖₚ) = -0.2

Find the Coefficient of Skewness when sum of upper and lower quartiles is 200, difference of upper and lower quartiles is 20 and median is 1

Find Pearson's Coefficient of Skewness (Sₖₚ) for a distribution when Mean = 160; Mode = 157 and Standard Deviation = 50.

Find Pearsonian's Coefficient of Skewness (γ₁) for a distribution when the the first three moments about 2 are 1, 16 and -40 respectively.