7.15 Translate the following string method invocations to functions calls in namespace str:

(Python)

(a) ' error'. upper( )

(b) ' 2, 3, 4, 5'. split(',' )

(c) ' mississippi'.count('i' )

(d) ' bell'.replace('e' , 'a' )

(e) ' '. format(1, 2, 3)