Please help me with the followign translations:
1. You cannot imagine how hard I worked - Vy ne mozhete predstavit' sebya skol'ko silno ya porabotal / rabotal
2. You cannot imagine how tired I am - Vy ne mozhete predstavit' sebya skol'ko ustavshii ya
3. I have a lot of tension due to work - U menya mnogo tentsii iz-za raboty