number1-1.java

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {

        //(c) Allow a user to enter 5 numbers and print the lowest value and how many numbers are between 75 and 100.

        Scanner input = new Scanner (System.in);

        int num, lowest_num=100, num_count=0;

        //System.out.println("Please enter a number: ");
        //num = input.nextInt();

        for(int i=1; i<=5; i++) {

            System.out.println("Please enter a number: ");
            num = input.nextInt();

            if(num < lowest_num) {
                lowest_num = num;
            }

            if(num >= 75 && num <=100) {
                num_count++;
            }
        }

        System.out.println("Lowest value: " +lowest_num);
        System.out.println("Amount of numbers between 75 to 100: " +num_count);
    }
}

pt2

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {

        //(d) Allow a user to enter 10 numbers and print highest number entered and the average of the numbers.

        Scanner input = new Scanner (System.in);

        double num, num_count = 0, sum = 0, ave, highest_num = 0;

        for(double m=1; m<=10; m++) {

            System.out.println("Please enter a number: ");
            num = input.nextDouble();

            num_count++;

            sum += num;

            if(num > highest_num) {
                highest_num = num;
            }
        }
        ave = sum / num_count;

        System.out.println("Average: " +ave);
        System.out.println("Highest value: " +highest_num);
    }
}