How to write this by seq command in R?

7. use the seq command to help answer the following questions: a. How many bars would a histogram have if the first bar's 1eft edge was at 10, the last bar's right edge was at 25, and each bar was 0.5 wide? b. what's the 372nd element of a sequence that starts at 3.1 and increments by . 3? (e.g., 3.1, 3.4, 3.7,...) c. Consider a sequence that starts at 1 and ands at 7 and which has 877 elements. How many elements are greater than 6.2