1. Find the arithmetic progression where t5 = 17 and t12 = 52
2. Find t6 of an arithmetic sequence given that t3 = 5.6 and t12 = 7
3. Find the 7th term of the arithmetic progression whose 5th term is m and whose 11th term is n.
4. Find the value of p so that p + 5, 4p + 3, 8p -2 will form successive terms of an arithmetic progression