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The government plans to introduce a "delayed retirement age policy" to address labor shortages caused by an aging population. To understand people's attitudes towards this policy, a random survey of 100 people aged between 15 and 65 was conducted. Using 45 years old as the dividing point, a 2x2 contingency table was obtained as shown below (unit: people):

|              | Below 45 years old | Above 45 years old | Total |
|--------------|--------------------|--------------------|-------|
| Support      | 35                 | 45                 | 80    |
| Not Support  | 15                 | 5                  | 20    |
| Total        | 50                 | 50                 | 100   |

1. Based on the above statistical data, determine whether it can be concluded that there is a difference in support for the "delayed retirement age policy" among different age groups divided by 45 years old, with the probability of making an error not exceeding 0.05.

2. If 45 years old is taken as the dividing point, 8 people who do not support the "delayed retirement" were sampled using stratified sampling method. Now, 2 people are randomly selected from these 8 people.
   1. Given that 1 person is below 45 years old, find the probability that the other person is above 45 years old.
   2. Let the number of people above 45 years old be denoted as X. Find the distribution table and mathematical expectation of the random variable X.

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