If a project is completed by Party A and Party B in 6 days, the manufacturer shall pay Party A and Party B 8700 yuan in total; if Party B and Party C are completed in 10 days, the manufacturer shall pay Party B and Party C 9500 yuan in total; if Party A and Party C are completed in 5 days, the manufacturer shall pay Party A and Party C 5500 yuan in total 【1】 How many days does it take for each team a, B and C to complete the whole project independently? 【2】 If the time limit is less than 15 days to complete the whole project, which pair will spend the least money to complete the project alone? Please explain the reason

If a project is completed by Party A and Party B in 6 days, the manufacturer shall pay Party A and Party B 8700 yuan in total; if Party B and Party C are completed in 10 days, the manufacturer shall pay Party B and Party C 9500 yuan in total; if Party A and Party C are completed in 5 days, the manufacturer shall pay Party A and Party C 5500 yuan in total 【1】 How many days does it take for each team a, B and C to complete the whole project independently? 【2】 If the time limit is less than 15 days to complete the whole project, which pair will spend the least money to complete the project alone? Please explain the reason

Suppose the daily workload of three people is a, B, C, a + B = 1 / 6 (a) B + C = 1 / 10 (b) a + C = 1 / 5 * 2 / 3 = 2 / 15 (c) (a) - (b) + (c) = 2 * a = 1 / 6-1 / 10 + 2 / 15 = 1 / 5 = > A = (1 / 5) / 2 = 1 / 10, so a needs 10 days = > b = 1 / 6-1 / 10 = 1 / 15, so B needs 15 days = > C = 1 / 10-1 / 15 = 1 / 30, so