I am trying to learn how to correctly use articles in English. It is a bit hard for me since I do not have this concept in my native language.
I am confused by two rules: the first rule is to use "a" whenever you introduce things, while the second one is to use "the" with prepositional phrases. I am wondering how I can identify when a prepositional phrase makes a noun definite.
For instance, which article shall I use in the next sentence?
I am working on a(the) Web application to assess (the) current performance of traffic companies.
I came up with a(the) solution that was based on my previous experience to solve our current problem.
On one hand, I mention the Web application for the first time. On the other hand, you know what Web application I am talking about (to assess the current performance of traffic companies).
Thanks in advance!