This problem involves only ideal springs. Technically, by "equivalent spring" we mean a virtual spring that behaves just as the combination of two or more actual springs. In this case, the two spring constants are $k_l=18\frac{N}{m}$ and $k_r=36\frac{N}{m}.$ The attached mass weighs $0\mathrm{.}32$ kg $.($a$)$ Find the equivalent spring constant for the two springs connected in series as shown in Figure a$.($b$)$ Find the equivalent spring constant to the two springs connected in parallel as shown in Figure b$.($c$)$ Which of these oscillating systems has the higher frequency of oscillation?