(a) How many different letter arrangements can be made from the letters in the word of TELECOMMUNICATION?

(b) How many different ways can a theatrical group select 2 musicals and 3 dramas from 11 musicals and 8 dramas to be presented during the year?

(c)  Six students are running for the positions of president and vice-president, and five students are running for secretary and treasurer. If the two highest vote-getters in each of the two contests are elected, how many winning combinations can there be?