I need help with R software code! Please help me write a code that does the foll

Question

I need help with R software code! Please help me write a code that does the following

1. Read in the data file, score.txt

2. Suppose our grading policy is: >= 90, A, 80~89, B, 70~79, C, 60~69, D, <60, F. Find the numbers of getting A, B, C, D, and F, based on Exam1.

3. Get a bar chart of grade distribution of Exam1.

score.txt sample

Gender   Hw1   Hw2   Hw3   Hw4   Exam1   Exam2
F   9   9   10   10   92   90
F   8   10   10   0   43   56
M   10   7   6   9   71   94
M   8   9   6   10   70   93
M   9   8   10   10   95   100
M   8   9   10   10   91   94
F   6   5   10   6   37   65
F   6   5   10   10   50   63
M   8   10   10   10   94   73
M   6   7   9   5   62   76
M   8   8   8   7   83   79
M   7   8   10   10   92   95
F   10   9   10   10   77   53
F   9   8   6   8   64   76
F   7   6   10   10   56   60
F   8   10   9   10   76   60
F   10   9   10   10   86   75
F   8   9   10   10   81   93

Explanation / Answer

# I am only reading Exam1 data, as it is only required.
Exam1 <- c(92, 43, 71, 70, 95, 91, 37, 50, 94, 62, 83, 92, 77, 64, 56, 76, 86,81)
A=B=C=D=E=0
for(i in 1:length(Exam1)){
if(Exam1[i]>=90){
A=A+1
} else if(80<=Exam1[i]<=89){
B=B+1
} else if(70<=Exam1[i]<=79){
C=C+1
} else if(60<=Exam1[i]<=69){
D=D+1
} else{
E=E+1
}
}

?in

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