question 2.7 Which is a series of times at which the excursion of a single harmonic movement is equal is to 2.80 cm if the amplitude is 6.50 cm, the period 1.13 s and the initial phase is 24. °? 

Select the correct answer from the following list (m = 0,1,2,3, ...):
a) .69 s + m*1.13 s 
b) .29e-1 s + m*1.13 s 
c) .16e-1 s + m*1.13 s 
d) .410 s + m*1.13 s