What does this rebus means ?

PROG WORKRESS

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

Forwards I am heavy, backward I am not. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

who is silent in the parliament?

What can go through glass without breaking it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)