4) Akbar is a manager at Kara Tyres. He suspects that the claim that their tyres can go 45000 km without being worn out is incorrect. He has sampled a group of 85 tyres and calculated that the average kilometers that his sample of tyres can go before being worn out. The average is46800, with the sample standard deviation of 3150 km. Is there evidence that the average kilometers for tyres is more than 45000?Test the hypothesis at 0.025 significance level using the critical value approach