5 The following table lists average monthly high temperatures C in St Johns NF for one year Feb Mar Apr 62 52 May Jun 79 87 Jul Aug Sep Oct Nov Dec 84 74 60 50 72 93 93 a Determine a sine or cosine equation to model this data Jan 47 b Graph your equation below Average Monthly High Temperatures for Oklahoma City OK Temperature Fahrenheit 100 90 228898899 80 70 60 50 40 30 20 10 10 Month January 1 6 B c Determine an equivalent sine or cosine function that models this data If you used sine in part a use cosine here If you used cosine in part a use sine here 12 14 16 18