Problem $1-$ String Operations $-40$ pointsDr. Bizzarus is on a mission. He is approaching people on the street and asking them to write a sentenceof their choice on a notepad. He is then going to generate statistics on the string. He wants to know theway they $$volunteers$$ space out their strings, the number of hexadecimal numeral characters, and thenumber of matched upper and lowercase characters found in the string. However, he is completely out of$2$

his depth with string processing and has just hired you to write a C$++$ program for him.This program has to use C$++$ string objects, and not C$-$strings.Specifications$$ Call this program stringops.cpp$$ Write a function called spaceCount that takes in a string as a parameter and returns the number ofwhitespace characters in the string. $(6$ points$)$ Write a function called digitCount that takes in a string as a parameter and returns the number ofhexadecimal numeral characters in the string. $(6$ points$)$ Write a function called caseMatchCount that takes in a string as a parameter and returns thenumber of matched lower and uppercase characters in the string. Each matched character pair mustbe counted only once. That is$,$ if you have a string $$HELLO World$,$ you will have $2$ matchedcharacters $-$ l and o$.$ The l$$s should not be counted twice. You will be allowed the use of parallelarrays for this. $(13$ points$)$ In the main function, accept a $$#$$ terminated string from the user. Then, print all the $3$ statisticsof the string. Repeat until the user enters $$Done$.(10$ points$)$ Please comment your code appropriately. $(5$ points$)$ You are restricted to the iostream, cctype and string libraries for this program.$$ You are not allowed to use the string class iterators like begin, end, rbegin, rend, etc.$$ The text entered may contain stray whitespace.Sample RunRegular text is what$$s printed by your program. Underlined text is user input, shown here as a sample.You will not be printing the underlined parts in your program.Enter the string: Maybe a story will cheer you up$.$Once upon a time there was an UglyBarnacle. He was so ugly, that everyone died.the end.#Number of whitespace charcaters: $31$Number of hexadecimal digits: $32$Number of matched characters: $5$Enter the string: Who are you $50$ people?!!#Number of whitespace characters: $4$Number of hexadecimal digits: $6$Number of matched characters: $0$Enter the string: Done#