Problem $1,$ part $($i$).$

Download DNASeqs.RData and then load it into your R workspace $($see HW$8$ for how to load external $.$RData files$).$ The data frame dna.seq has $11$ rows and $1620$ columns, where each row vector is the DNA sequence of some protein. The length of the sequence is $1620,$ and each column represents one nucleotide. Run the following code to compute the distance matrix, dna.dist, which will be used for hierarchical clustering.

n $<-$ nrow$($dna$.$seq$)$

D $<-$ matrix$(0,$ nrow$=$n$,$ ncol$=$n$)$ # create an empty n$-$by$-$n matrix

row.names$($D$)<-$ row.names$($dna$.$seq$)$

for $($i in $1$:n$)\{$

for $($j in $1$:i$)\{$

D$[$i$,$ j$]<-$ sum$($dna$.$seq$[$i$,]!=$ dna.seq$[$j$,])$

$\}$

$\}$

# convert the numeric matrix D to a "distance matrix" object

dna.dist $<-$ as$.$dist$($D$)$

According to dna.dist, what is the distance between Pbe$5$ and Pme$2?$