What are the normal beta hCG levels for a 4 weeks and 5 days old pregnancy? Please answer asap.

Varies. It can be from 200 to 5000. An average would be about 1000. You may need to look at what percentage of rise there is to look at viability of a pregnancy. You may also need to check Progesterone levels.
1400-3600. There is a wide range of possible HCG levels in pregnancy, but for 4w and 5d, the average levels will be between 1400 and 3600.