Ishraaq, Chaasht and Awwaabeen

Q: I would like to know what are the virtues, times and rakaats for salaatul ishraaq and chaasht?

Q: What is the soonest time one can read ishraaq after sunrise?

Q: How does one perform the awwaabeen salaah and what is the virtue of it?

Q: On Eid day can Ishraaq Salaah be performed or no Salaah can be performed before and after the Eid Salaah?

Q: Is it permissible to read 1 x 4 rakaat salaah for ishraaq instead of 2 x 2 rakaats salaah. Similarly with awwaabeen etc?

Q: A person read in his Awwabeen Salaah a portion of his qiraat alound and a portion softly. Is his Salaah valid? If valid, is sajda-e-sahw waajib upon him?

Q: Is ishraaq and chaast salaah the same or we should read both because I am regularly reading ishraaq but chast I read some times. Someone said it is the same, if you read it in the early morning it is ishraaq and if you read it later than it is called chasit. Please explain.

Q:

1. What time is best to read chaasht Salah 10 or 11 o clock and also what time does it start?
2. If we read chaasht does it give barakah in food, if yes whats the daleel.
3. Did the prophet read Ishraaq and chaasht? I heard to read 2 rakah ishraq, Allah gives you the reward of umrah. Whats the daleel?

Q: Can we read salaatul chaast at the time of ishraaq?

Q: The Mukrooh time for Asr Salaah sets in when the sun looses its glare and one is able to gaze directly at the sun without any hurt to the eye. If this is correct, then will it be correct to apply the opposite  in order to establish the time of Ishraaq? I.e. After sunrise, as long as one is able to look directly at the sun the time of Ishraaq has not yet set in. However, once one is not able to look directly at the sun, can it be said that the time of Ishraaq has set in? Generally we are told that Ishraaq can be made 10-15 minutes after the time of sunrise. However, in some places it has been noticed that after 5-7 minutes (from the time of sunrise stated on the calender) the sun becomes bright enough that one is not able to gaze directly at it. Furthmore, what is the easiest way to determine the time of Ishraaq when the time of sunrise is not known?