Questão 1
# Carregamento dos dados
MRT_1F <-c(517.1468515630205, 85.13094142168089, 30.333207896694553, 12.694776264558937, 3.3041601673945418, 1.1823111717498882, 1.1892293502386786)
MRT_3F <-c(156.68929936163462, 11.540837783562276, 0.4512835621696538, 0.4509797929766453, 0.4502068233039181, 0.4496185276300172, 0.4543157082191288)
MRT_5F <-c(83.90319666471157, 0.3068151086494968, 0.30522314133037304, 0.3072588968084928, 0.30655265997285697, 0.3055812715727718, 0.3053297166713006)
MRT_10F <-c(29.55430642951759, 0.19832832665772515, 0.1971923924717474, 0.19796648905716516, 0.19615594370806338, 0.2034569237883263, 0.19617420889447737)
MRT_15F <-c(11.317736530583566, 0.167364215666193, 0.16172168266811013, 0.16701085329580515, 0.1598052657153692, 0.1645934043532696, 0.16216563797118075)
MRT_sem_F <-c(11.93430909937736, 0.6095414637034009, 0.6060645101029295, 0.612167181646899, 0.6146761002685637, 0.6096747087200697, 0.6125810476877268)
clock <- c(0.1, 0.5, 1, 1.5, 2, 2.5, 3)
# Plotagem do gráfico
plot(clock, MRT_1F, type = "o", col = "black", lty = 1, lwd = 2, xlab = "Time between Things requests (seconds)", ylab = "Response time (sec.)", pch=4)
# Adicionar linhas
lines(clock, MRT_3F, type = "o", col = "yellow", lty = 1, pch=7)
lines(clock, MRT_5F, type = "o", col = "red", lty = 1, pch=1)
lines(clock, MRT_10F, type = "o", col = "blue", lty = 1, pch=2)
lines(clock, MRT_15F, type = "o", col = "purple", lty = 1, pch=5)
lines(clock, MRT_sem_F, type = "o", col = "green", lty = 1, pch=4)
# Adicionar legenda
legend("topright", legend = c("1 Fog", "3 Fogs","5 Fogs","10 Fogs","15 Fogs","w/o Fogs"), col = c("black", "yellow","red", "blue","purple","green"), lty = c(1,1,1,1,1,1), pch = c(4, 7,1,2,5,4), lwd = c(2, 2,2,2,2,2))

Questão 4
# Carregar o conjunto de dados
sales <- read.table("https://training-course-material.com/images/8/8f/Sales.txt", header = TRUE)
# Calcular a porcentagem de vendas por país
sales$Percentage <- sales$SALES / sum(sales$SALES) * 100
# Cores para as fatias
cores <- c("skyblue", "lightcoral", "lightgreen", "lightpink", "lightgoldenrodyellow", "chocolate")
# Criar o gráfico de pizza
pie(sales$Percentage, labels = paste(sales$COUNTRY, "\n", round(sales$Percentage, 1), "%"), col = cores, main = "Distribuição Percentual de Vendas por País")
# Adicionar legenda
legend("topright", legend = sales$COUNTRY, fill = cores, title = "País", cex = 0.8)
