Write a program that let the user input multiple float values and output the average and variance of the user input. Input -1 indicates the end of the input. Do not use arrays in this program. (40 points) Sample input: 1.1 2.3 3.4-1 Sample output: 2.266667 0.882 Hint: the definition of average and variance for data set a, a, a, are as follows Aeg-a Var-1- Avg= i=1 11