The regression equation Y=3+2x has been calculated from 6 pairs of values, with x range from 1 to 10. The correlation coefficient is 0.8. It is estimated that y=43 when x=20.Which of the following are true?(i)The estimate is not reliable because x is outside the range of the data(ii)The estimate is not reliable because the correlation is low(iii)The estimate is reliable(iv) The estimate is not reliable because the sample is small