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In computer science, BackusNaur form or Backus normal form (BNF) is a meta syntax notation for Context-Free Grammars, often used to describe the syntax of languages used in computing, such as computer programming languages, document formats, instruction sets, and communication protocols. In this context, develop the BNF grammar and parse tree for the following Program: #include int main() { int n,r,sum=0,temp; printf("enter the number="); scanf("%d",&n); temp=n; while(n>0) { r=n%10; sum=sum+(r*r*r); n=n/10; } if(temp==sum) printf("armstrong number "); else printf("not armstrong number"); return 0; }