Misc: In what year did Blaise Pascal invent the digital calculator?

Questions

which charles dickens novel was brought to the screen by david lean?

in which 1974 disaster movie did fireman steve mcqueen need a long ladder?

which television island gave well-heeled guests the chance to live out their dreams in the 1970's?

who was the actor who played bobby ewing in dallas?

name the swimmer who became a hollywood star in the 1940's and 50s in films such as bathing beauty and neptune's daughter?