Solve in RStudio: provide solution with formulas

Read the provided dataA dataset, which contains data for 1102 cancer patients who took part in a 5-year clinical trial. At the start of the trial patients were randomly divided into three groups: placebo group, current drug group, new drug group. Variables are as follows: patientID is a unique patient number, age is the age at the start of the trial, sex is obvious, treatment denotes to which group a given patient was assigned: placebo group (placebo), current drug group (drugA), or new drug group (drugB), death denotes whether a patient died within 5 years form the start of the trial, years say how much time (in years) did a patient live after the trial started (if he/she lived for more than 5 years, i.e. more than the trial length, then the value of years is missing), and comorb denote how many comorbid conditions (e.g. diabetes, cardiac problems, kidney failure) did a patient have at the start of the trial. Answer the following questions:

What was the average time to death for those who died within 5 years from the start of the trial? How much was this rate equal to?

What is the ID of the youngest woman with no comorbidities who died?

Out of the age groups [50, 60) and [60, 70) which one had a higher survival rate?

patientID	age	sex	treatment	death	years	comorb
ijz448u	61	female	placebo	0	NA	1
mjd397n	70	female	placebo	1	2,1126247	3
bhx778v	72	female	placebo	1	1,08552999	2
tvw756m	71	male	placebo	1	1,30583999	3
plh588t	58	female	drugA	0	NA	1
nak372i	55	male	placebo	0	NA	1
jsj899n	70	male	drugA	0	NA	2
vfv311g	61	male	placebo	0	NA	1
vzr374f	64	female	placebo	0	NA	0
hzr241n	62	male	placebo	0	NA	2
lcm436i	61	female	drugB	0	NA	0
hyj351j	61	male	drugB	1	1,1022224	3
zji684b	58	female	drugB	1	4,72435589	3