Misc: What ship was torpedoed and sunk off the coast of Ireland on May 7th 1915?

Questions

Muppet Mania: The name of the Elephant friend of Big Bird on 'Sesame Street'?

Muppet Mania: this is a bear's natural habitat (The Muppet movie)?

Muppet Mania: This muppet was a piano playing dog?

Muppet Mania: What is the name of Dr. Teeth's band?

Name one of the 2 girls that shared the flat with Robin in "Man About The House"?