d- and f-Block · Paramagnetism of d and f ions

Number of paramagnetic ions among the following d- and f-block metal ions is .

$\ce{Mn^2+}$, $\ce{Cu^2+}$, $\ce{Zn^2+}$, $\ce{Yb^2+}$, $\ce{Sc^3+}$, $\ce{La^3+}$, $\ce{Gd^3+}$, $\ce{Lu^3+}$, $\ce{Ti^4+}$, $\ce{Ce^4+}$

(Atomic number of Mn = 25, Cu = 29, Zn = 30, Yb = 70, Sc = 21, La = 57, Gd = 64, Lu = 71, Ti = 22, Ce = 58)