I know how to do the decimal => binary with dividing by 2 for the 1021 and mult. by 2 for the 0.4, and i know the sign bit will be 0 since the # is positive. I am not sure how to split up that knowledge into getting the exponent value and how to display the mantissa as 10 bits (whether to add a 0 to the begging of 1111111101, or to include a decimal place of the 0.4?)

thank you!

Convert 1021.4 to 16-bit floating point (in IEEE 754 standard). Note 1-sign bit (S), 5 exponent bits (E) (with a bias of 15), and 10 mantissa bits (M). Place answers in blank1 - S, blank2 E, and blank3 M. Blank # 1 Blank # 2 Blank # 3