HiiI IMa fail my clas

Anna is no more than 3 years older than 2 times jamie’s age. jamie is at least 14 and anna is at most 35. which system of linear inequalities can be used to find the possible ages of anna, a, and jamie, j?

How to do this , and can some one explain

Find the midpoint m of z1=(8+5i) and z2=(12+3i)