Code grade says Q6, Q7 and Q8 are not correct. Why is that?

## Q4: Create a copy of my_fam_heights, called `new_fam_heights`. Change the 3rd value to 2.2 and store new_fam_heights as Q4.

```{r} ### Do not change and do not delete the comment below. It is required for Code Grade to run properly. # CG Q4 #

### TYPE YOUR CODE BELOW ###

my_fam_heights

### VIEW OUTPUT ### Q4

```

## Q5: Create Q5 with the mean (i.e. average) of Q4.

```{r} ### Do not change and do not delete the comment below. It is required for Code Grade to run properly. # CG Q5 #

### TYPE YOUR CODE BELOW ###

Q5

### VIEW OUTPUT ### Q5

```

## Q6: Round Q5 to one decimal place and assign the result to Q6.

```{r} ### Do not change and do not delete the comment below. It is required for Code Grade to run properly. # CG Q6 #

### TYPE YOUR CODE BELOW ###

Q6

### VIEW OUTPUT ### Q6

```

## Q7: Find the median of Q4 and assign the result to Q7.

```{r} ### Do not change and do not delete the comment below. It is required for Code Grade to run properly. # CG Q7 #

### TYPE YOUR CODE BELOW ###

Q7

### VIEW OUTPUT ### Q7

```

## Q8: Convert all the heights stored in Q4 (as feet) to centimeters and assign the result to Q8.

```{r} ### Do not change and do not delete the comment below. It is required for Code Grade to run properly. # CG Q8 #

### TYPE YOUR CODE BELOW ### conversion_factor

Q8

### VIEW OUTPUT ### Q8