Question 1 [14] The following data set indicates the amount of water usage per month (in kiloliters) for a sample of 12 households in a Polokwane suburb. 20 25 30 45 20 36 22 35 30 20 18 19 1.1 Compute the mean water usage of the 12 households. 1.2 Find the mode. 1.3 Find the first and the second quartile of water usage amongst the 12 households. 1.4 Compute the variance of the water usage for the 12 households. Explain it clealry and need typed answers Thank you