Question: If string a1 and string s2 are two string variables, containing some strings, how do you a) print out the number of characters of s1

If string a1 and string s2 are two string variables, containing some strings, how do you a) print out the number of characters of s1 to the screen b) concatenate s1 and s2 and store the result in another string c) determine whether s2 contains the string "cool" d) display the lower-case version of the string s2 to the screen

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