Please show step by step process.

Math 7 Mini-Task: Hypothesis Testing using ztest l. Test the following hypothesis using the steps in hypothesis testing. Criteria for checking: Step 1 - 2 points Step 4-5 points Step2-l point Step5- 2 points Ste I 3-2 o oints Ste 0 6-2 a oints l. A manufacturer of cellular phone batteries that when fully charged, the mean life of his products lasts for 26 hours with a standard deviation of 5 hours. Mr. DG. a regular distributor, randomly picked and tested 35 of the batteries. His test showed that the average life of his sample is 24.3 hours. Is there a significance difference between the average life of all of the manufacturer's batteries and the average battery life of his sample? Use 5% as the level of significance. 2. The data were gathered from the result of testing the effectiveness of two different strategies in increasing the mean sales fa product. Can we conclude that there is a significant difference between the two strategies based from the mean sales? Test the hypothesis using 10% level of signicance with the given data in each strategy