I'm having trouble with showing the work to do these the first answer is 1) approx. 81.5% 2) approx. 84%

can you help me with my work ?

5) Health care issues are receiving much attention in both academic and political arenas. A 5) sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for government health care but who have no private health insurance. The ages of 25 uninsured senior citizens were as follows: 68 73 66 76 86 74 61 89 65 90 69 92 76 62 81 63 68 81 70 73 60 87 75 64 82 Suppose the mean and standard deviation are 74.0 and 9.7, respectively. If we assume that the distribution of ages is bell shaped, what percentage of the respondents will be between 64.3 and 93.4 years old? 6) Solar energy is considered by many to be the energy of the future. A recent survey was 6) taken to compare the cost of solar energy to the cost of gas or electric energy. Results of the survey revealed that the distribution of the amount of the monthly utility bill of a 3- bedroom house using gas or electric energy had a mean of $117 and a standard deviation of $13. If the distribution can be considered bell shaped, what percentage of homes will have a monthly utility bill of more than $104