Exercise 5.1 Which of the following formulae can be considered an algorithm for computing the area of a triangle whose side lengths are given positive numbers a, b, and c? (Note, all three are accurate formulae but only one is a valid algorithm.) a. S-vpp-arp-bjp b. S-besin A, where A is the angle between sides b and c c. S ah where ho is the height to base a -c), where p (a + b + c)/2