4. In forming 5 letter words using the letters of the word EQUATIONS. Note that a word is an ordered arrangement of letters. How many (i) consist only of vowels? (ii) contain all the consonants? (iii) begin with an 'T' and end in 'Q'? (iv) begin with a consonant? (v) contain 'S'? (vi) in which the vowels and consonants alternate? (vii) in which 'Q' is immediately followed by 'U'?