Question 3: (a) We want to write a recursive function S(0 to calculate the square of an integer n. Develop (n-1) and derive the recurrence formula for S(n). (2 marks) else n- t n; Give on la 1+2 : Write a recursive function that prints a triangle of stars as shown, using the printChar) function below. (4 marks) (b) print triangle ( 7 ); print-triangle ( 3 ); void print. Char( int n, char c, bool e=false ) { for ( int i=0; in; i++ ) cout