different opinions about connecting "in the mornings" to "Monday throught Friday"

[ansonman]

I am trying to say in a concise way "John is usually here on Monday mornings, Tuesday mornings, Wednesday mornings, Thursday mornings, and Friday mornings."

I have made up (1a) and (1b) the sentences below.

(1a) John is usually here in the mornings Monday through Friday.

(1b) John is usually here Monday through Friday in the mornings.

Most of my non-native friends thought neither one was correct. So they revised the sentences to the one below.

(1c) John is usually here Monday through Friday mornings.

The rest of my friends didn't agree with them. I have written their version below.

(1d) John is usually here Monday mornings through Friday mornings.

Please help me with this problem. Thank you very much for your time and help.

[Alan]

John is usually here in the morning, Monday through Friday (AmE)/from Monday to Friday (BrE).