The ornamental design for an electriccooker, as shown and described.
1. Electric cooker
FIG. 1 is a perspective view of an electric cooker;
FIG. 2 is front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof; and
FIG. 7 is a bottom view.
The broken lines in FIGS. 1, 6 and 7 depict features of the electric cooker that form no part of the claimed design. The plane within the solid line and upon which the legs and unclaimed features of the article are placed in FIG. 7 is a portion of the electric cooker that forms no part of the claimed design.