Which equation represents the sentence? Four more than one-third a number is equal to 14.

A. 1/3(n+4)=14
B. N/3 + 4= 14
C. 4n + 1/3 = 14
D. 4(n/3) = 14

Can y'all explain to me I don't get it pleaseee help

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6