Modify the sentinel$.$ py program to use a priming and a modification read $($see the "Application: Processing Sentinel Values"

section$).$ The program should achieve the same result of computing an average salary and use a sentinel value of $-1.$

# Initialize variables to maintain the running total and count.

total $=0\mathrm{.}0$

count $=$

# Process data until the sentinel is entered.

# Your code goes here

while salary $0\mathrm{.}0$ :

# Your code goes here

# Compute and print the average salary

if count $>0$ :

average $=$ total $\frac{?}{?}$ count

print$("$Average salary is$",$ average$)$

else :

print$("$No data was entered."$)$

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