3. For numbers in Pascal programming language - numbers are integer (no decimal point) or real (numbers with decimal point or scientific notation with real numbers having at least one digit before and after the decimal point): a. Draw a syntax diagram b. Use the syntax diagram to write its grammar in EBNF 4. Find an EBNF grammar and draw a syntax diagram for each of the following languages: L =a* | b* L=a*b* Lab | ba* a. b. c.