C++ please

1. Write a program that a function that takes an item's wholesale cost and its markup percentage and returns the item's retail cost. For example, if an item's wholesale cost is $5 and the markup is 100%, the item's retail price is $10.00. Use the function in a program.

2. Write a function that simulates a coin toss. The function should return either heads or tails based on a random number. The possible random numbers are 1 for heads and 2 for tails. Write a program that calls the function 100 times and counts the number of heads and tails.

3. Write a Boolean function that determines if a number is even or odd. Use the function in a program.

4. Write a function that determines if a letter in a string is a consonant. Use the function to count the number of consonants in any string passed to the function.

5. Write a function that takes a numeric grade and returns the letter grade of the numeric grade, using a 90,80,70,60 grading scale.