Q.6. Redi-Mix Incorporated kept the following record of time (to the nearest 100th of a minute) its truck waited at the job to unload. [03] 0.10 0.45 0.50 0.32 0.89 1.20 0.53 0.67 0.58 0.48 0.23 0.77 0.12 0.66 0.59 0.95 1.10 0.83 0.69 0.51 (a) Calculate the lower and upper quartiles. (b) Calculate the 46th percentile, 5th deciles, 95th percentile and 7th deciles. (c) Calculate the inter-quartile range.