Using the attachments answer the following questions and explain how you came to the answers please.

`for D G Services Contract - Practical Exercise S DATA TOPUT STDDEV'S from MEAN 3.5 Data STD DEV'S mean + 2 Sto Dev - 2 5to Dev From MEAN 1690 060 50 56.43 91.40 \\41.45 25 75 65.43 \\91.40 75 41.45 \\- 1.32 \\149| 56.43\\ 91.40 0.50 41.45 65 56.43 91.40 41.45 10. 69\\ -051 85 56.43\\ 91.40 41.45 - 0. 11\\ 1.5 \\55 66.43\\ 91.40 \\60 41.45\\ 65.43 91.40 41.45 - 0. 921 09 \\60 \\66.43 91.40 41.45 -0591 66.43\\ 91.40 \\41.45 -0.51| 0.5 \\60 66.43 91.40 \\41.45 -0.51| 60 66.43 91.40 \\41.45 - 051/ 65.43 \\50 5 71 562 | 62