completed questions 1, 3 and 4

question-four/iteration.sh

+#!/bin/bash
+
+counter=1
+
+while [ $counter -le 50 ]
+do
+	if [ $(($counter % 2)) != 0 ]
+	then
+		echo "Number is :  $counter"
+	fi
+((counter++))
+done

question-one/generatesql.sh

+#!/bin/bash
+
+while IFS="," read c1 c2 c3
+do
+	echo "insert into myfurits (code, name, color) values ($c1,\"$c2\",\"$c3\");"
+done < sample.txt
+

question-one/sample.txt

+1,Apple,Color is Red
+2,Mango,Color is Orange
+3,Banana,Color is Yellow

question-three/stringmanipulation.sh

+#!/bin/bash
+
+for file in $1
+do
+	if [[ -f $file ]]
+	then
+		echo ${file^^}
+	else
+		echo "File ${file} not found"
+	fi
+done
+

question-three/test.txt

+test file