8. A 25-year programme for building new houses began in Core Town in the year 1986 and finished in the year 2010.
The number of houses built each year form an arithmetic sequence. Given that 238 houses were built in the year 2000 and 108 were built in the year 2010, find
- the number of houses built in 1986, the first year of the building programme,
- the total number of houses built in the 25 years of the programme.