Use both minitab program to solve the above models.(there is no topic)

quarters sales
1 105
2 135
3 120
4 105
1 90
2 120
3 145
4 140
1 100
2 80
3 100
4 110

problem .the above time series shows the sales of a particular product over 3 years.

consider the model:
ojzszkq6qtksuvork5cyii=

estimate all the parameters of the above model.
using the above model test the existence of first order autocorrelation.
based on your results in (b), predict the next four observations.
2. suppose

yt= b0 + b1t + b2 sin(2pt/4) + b3 cos(2pt/4) +et,

estimate all the parameters of trigonometric model.
using the above model test the existence of first order autocorrelation.
based on your results in (b), predict the next four observations.
compare models (1) and (2) and show which is better to predict the given data. state your reasons why the preferred model is better
e