There are four presidential candidates in a country. A street survey was conducted asking 2,500 registrated voters which candidate they will vote for in the coming election. The table summarizes the results of the survey. Candiadte 1 250, Candidate 2 1,250, Candidate 3 450, Candidate4 550. What is the probability of randomly selecting a person who will vote for candidate 1 or 2? Part2. If 1000 more voters are surveyed, how many of them will likely prefer Candidate 3 or 4