Use the heart beat data from problem #7: No drug: 291 296 300 301 305 311 311 313 317 320 321 322 323 323 325 326 331 333 334 338 341 344 344 350 355 330 331 335 337 339 343 346 349 350 358 364 369 375 387 398 402 a) State the 20th percentile for the No-drug group, and the 80th percentile of the Drug Drug: group. b) State two numbers - one for each group- that indicate which group has more variation. c) Are the data for those who are using the drug symmetric, positively skewed, or negatively skewed? Give number(s) to support your decision.