could you help please with the correct answers

A terminal has four customers that need delivery by truck. The customers have the following demand: Customer Demand 1 5 tonnes 2 9 tonnes 3 7 tonnes 4 11 tonnes The truck load capacity is 15 tonnes. The distances (km) between the customers and the terminal are: Terminal Customer 1 Customer 2 Customer 3 Customer 4 Terminal Customer 1 120 Customer 2 90 40 Customer 3 140 20 30 Customer 4 180 15 45 60 4a. Calculate the driving distance savings matrix. Disregard from any load capacity issues at this point. 4a.1. How much is saved if Customer 1 and 2 are served in one route? Enter the correct integer value in the input field. km 4a.2. How much is saved if Customer 1 and 3 are served in one route? Enter the correct integer value in the input field. km 40.3. How much is saved if Customer 1 and 4 are served in one route? Enter the correct integer value in the input field. km 4a.4. How much is saved if Customer 2 and 3 are served in one route? Enter the correct integer value in the input field. km