The sum of the first ten terms of an Arithmetic Progression (A.P.) is 130. If the fifth term is 3 times the first term, find the:

common difference;
first term;
number of terms of the A.P. if the last term is 28.






The sum of the first ten terms of an Arithmetic Progression (A.P.) is 130. If the fifth term is 3 times the first term, find the:

common difference;
first term;
number of terms of the A.P. if the last term is 28.

