please I need calculation and explanation for those two question

5. QUESTION The strength of concrete depends, to some extent, on the method used for drying it. Two different drying methods yielded the results shown in the accompanying table for independently tested specimens {measurements in psi]. Method l Method ll Sample size 3' 10 Sample mean 325(} 3240 Sample 2 10 190 standard deviation Method I Method I I Simple size 7 10 Simple mean 3250 3244!] Sample standard deviation 210 190 5.1: Construct a 95% condence interval for the difference in mean strength concrete produced between Method l and Method II 5.2: Is there sufficient evidence to conclude that there is no difference in mean strength concrete produced between Method l and Method ll? Explain your