On average they are as good or as bad as the general public.
Thats a stupid question. Next.
No, it's not true, lots of engineers are very good with mathematics, physics and their engineering but they cannot write a good paper for their life.
No, it is not common for engineers to be unable to write essays and papers. Many engineers work on research, auditing, managing, quality control. equipment design, ,,, etc. All those categories of engineers sure learned and knew how to write reports and essays.
Not usually.
Yes
Yes engineers design more than write and if they do write its usually on a computer which can help you write.
true
To offload some of the mountain of documentation writing work from the engineers.
Agatha Cristie is known as the queen of true crime writers
There can be no generalisation about mathematicians or any other professions. Even some authors are not good writers!
yes