a$)$ Enumerate the various methods to measure horizontal distances with their respective accuracies.

b$)$ Discuss the sources of errors that affect the operations of Electronic Distance Measuring $($EDM$)$ equipment.

c$)$ Why should all measuring tapes be frequently standardized? Explain the method of tape standardization using a baseline.

d$)$ State the reasons that have made the Electronic Distance Measuring $($EDM$)$ equipment popular among surveyors.