I just need to identify which is an independent data set and which is a match pair data set

For the following questions, please identify as independent data sets or matched paired data sets (For the week 13 online participation 2 of 2, we will use the same questions to do some calculation): 1) Twelve cars were equipped with radial tires and driven over a test course. Then the same 12 cars (with the same drivers) were equipped with regular belted tires and driven over the same course. After each run, the cars' gas economy (in km/I) was measured. Car Gas eco. 1 2 3 4 5 6 7 8 9 10 11 12 Y, (radial) 4.2 4.7 6.6 7.0 6.7 4.5 5.7 6.0 7.4 4.9 6.1 5.2 Yz (belted) | 4.1 4.9 6.2 6.9 6.8 4.4 5.7 5.8 6.9 4.7 6.0 4.9 Use 0.05 significance level to test the claim that radial tires produce better fuel economy? (Assume normality of data) 2) The mean tension bond strengths of two types of cement mortar (modified and unmodified) are known to be normally distributed. Two simple random samples from the modified and unmodified populations of bond strengths are given by (16.85, 16.4, 17.21, 16.35, 16.52, 17, 16.96, 17.16, 16.59, 16.57] and [17.5, 17.63, 18.25, 18, 17.86, 17.75, 18.22, 17.9, 17.96, 18.15). respectively. Let u1 denotes the true mean tension bond strength of the modified mortar and u2 denotes the true mean tension bond strength of the unmodified mortar. Use a 0.05 significance level to test the claim that mean tension bond strength of the modified mortar is greater than the unmodified mortar